Plant Kingdom: NEET practice with the reasoning written out

Free questions

30 solved MCQs, answer marked and reasoning written out

Every question below is free to read — no sign-up, no email. 4 of them are real questions from past NEET papers. The other 193 questions in this chapter are in the book and in practice access.

1. Q1 Multi-statement analysis

   Bryophyte sporophyte: (i) the zygote undergoes reduction division immediately (ii) the sporophyte is not free-living (iii) it is attached to and nourished by the gametophyte (iv) some of its cells undergo meiosis to give haploid spores. How many are correct?

   1. 1.One
   2. 2.Two
   3. 3.ThreeCorrect answer
   4. 4.Four

   Why option 3 is the answer

   The trap: (ii)–(iv) correct; the zygote does NOT divide reductionally immediately, so (i) is wrong.

   What this is testing: how the bryophyte sporophyte behaves once it forms.

   (i) is the trap. The zygote does NOT divide reductionally right away — it first grows by mitosis into a multicellular sporophyte, and meiosis happens much later, inside the capsule.
   (ii) is correct. The sporophyte can never live on its own.
   (iii) is correct. It stays attached to and is fed by the gametophyte throughout its life.
   (iv) is correct. Some sporogenous cells inside the capsule undergo meiosis to give haploid spores.

   So three statements are correct.

   The zygote divides by mitosis first and meiosis much later, inside the capsule. Meiosis always makes spores, never the sporophyte itself.

   NCERT Class 11 Biology, page 29

2. Q2 Multi-statement analysis

   Gymnosperm gametophyte: (i) male gametophyte is a highly reduced pollen grain (ii) female gametophyte is multicellular with two or more archegonia (iii) the gametophytes are free-living (iv) they are retained within sporangia on the sporophyte. How many are correct?

   1. 1.One
   2. 2.Two
   3. 3.ThreeCorrect answer
   4. 4.Four

   Why option 3 is the answer

   The trap: (i),(ii),(iv) correct; gymnosperm gametophytes are NOT free-living, so (iii) is wrong.

   What this is testing: whether gymnosperm gametophytes live independently.

   (i) is correct. The male gametophyte is reduced to the pollen grain.
   (ii) is correct. The female gametophyte is multicellular, bearing two or more archegonia.
   (iii) is the trap. Gymnosperm gametophytes are NOT free-living — unlike pteridophyte gametophytes, they never leave the parent sporophyte.
   (iv) is correct, and it is exactly why (iii) is wrong: both gametophytes stay retained within sporangia on the sporophyte.

   So three statements are correct.

   Gymnosperm gametophytes never leave the parent plant. Pteridophytes still release a free-living prothallus; gymnosperms do not.

   NCERT Class 11 Biology, page 33

3. Q3 Multi-statement analysis

   Gymnosperm ovule/seed: (i) megaspore mother cell arises from the nucellus (ii) nucellus with envelopes forms the ovule (iii) the megaspore mother cell undergoes meiosis to give four megaspores (iv) pollen is carried by water currents. How many are correct?

   1. 1.One
   2. 2.Two
   3. 3.ThreeCorrect answer
   4. 4.Four

   Why option 3 is the answer

   The trap: (i)–(iii) correct; gymnosperm pollen is carried by AIR currents, so (iv) is wrong.

   What this is testing: the formation of the gymnosperm ovule, and how pollen actually travels.

   (i) is correct. The megaspore mother cell arises within the nucellus.
   (ii) is correct. The nucellus together with its envelopes makes up the ovule.
   (iii) is correct. The megaspore mother cell undergoes meiosis to give four megaspores.
   (iv) is the trap. Gymnosperm pollen is carried by AIR currents, not water — water-dependent fertilisation belongs to bryophytes and pteridophytes.

   So three statements are correct.

   Gymnosperm pollen is carried by wind, never by insects. Naked ovules and wind pollination go together.

   NCERT Class 11 Biology, page 33

4. Q4 Multi-statement analysis

   Classification systems: (i) earliest systems used gross morphology (ii) Linnaeus' system was based on the androecium (artificial) (iii) Bentham and Hooker gave a natural system (iv) phylogenetic systems are based on evolutionary relationships. How many are correct?

   1. 1.One
   2. 2.Two
   3. 3.Three
   4. 4.FourCorrect answer

   Why option 4 is the answer

   The trap: All four are correct.

   What this is testing: how classification systems developed over time.

   All four are correct. (i) The earliest systems used only gross external form. (ii) Linnaeus' system was artificial, built around the androecium. (iii) Bentham and Hooker gave a natural system. (iv) Phylogenetic systems are based on evolutionary relationships between organisms.

   Each names a different system correctly, so nothing here is reversed. So all four are correct.

   NCERT Class 11 Biology, page 23

5. Q5 Multi-statement analysis

   Modern taxonomic methods: (i) numerical taxonomy uses computers and gives each character equal weight (ii) cytotaxonomy uses chromosome number, structure and behaviour (iii) chemotaxonomy uses chemical constituents (iv) artificial systems use internal features like embryology. How many are correct?

   1. 1.One
   2. 2.Two
   3. 3.ThreeCorrect answer
   4. 4.Four

   Why option 3 is the answer

   The trap: (i)–(iii) correct; internal features (embryology, anatomy) belong to NATURAL systems, so (iv) is wrong.

   What this is testing: which system of classification uses internal features.

   (i) is correct. Numerical taxonomy uses computers and gives every character equal weight.
   (ii) is correct. Cytotaxonomy is based on chromosome number, structure and behaviour.
   (iii) is correct. Chemotaxonomy uses the chemical make-up of the plant.
   (iv) is the trap. Internal features such as embryology belong to NATURAL systems of classification, not artificial ones — artificial systems use only a few, often external, characters.

   So three statements are correct.

   Numerical, cyto- and chemo-taxonomy. Each uses a different kind of evidence - computed characters, chromosomes, chemistry.

   NCERT Class 11 Biology, page 24

6. Q6 Multi-statement analysis

   Fusion types in algal sexual reproduction: (i) isogamous – gametes similar in size (ii) anisogamous – gametes dissimilar in size (iii) oogamous – large non-motile female + small motile male (iv) all algal sexual reproduction is oogamous. How many are correct?

   1. 1.One
   2. 2.Two
   3. 3.ThreeCorrect answer
   4. 4.Four

   Why option 3 is the answer

   The trap: (i)–(iii) correct; fusion may be iso-, aniso- OR oogamous, so (iv) is wrong.

   What this is testing: the three kinds of gametic fusion seen in algae.

   (i) is correct. In isogamy the fusing gametes are similar in size.
   (ii) is correct. In anisogamy they differ in size.
   (iii) is correct. In oogamy a large, non-motile female gamete fuses with a smaller, motile male gamete.
   (iv) is the trap. Algal sexual reproduction can be isogamous, anisogamous OR oogamous — it is not always oogamous.

   So three statements are correct.

   Isogamy, anisogamy, oogamy - similar, dissimilar, and one large and still. The series runs from equal partners to fully specialised ones.

   NCERT Class 11 Biology, page 24

7. Q7 Multi-statement analysis

   How many of these are green algae — (i) Chlamydomonas (ii) Ulothrix (iii) Spirogyra (iv) Chara (v) Sargassum?

   1. 1.Two
   2. 2.Three
   3. 3.FourCorrect answer
   4. 4.Five

   Why option 3 is the answer

   The trap: Four are green algae; Sargassum is a brown alga.

   What this is testing: spotting the one alga in the list that does not belong to Chlorophyceae.

   Chlamydomonas, Ulothrix, Spirogyra and Chara are all green algae. Sargassum is the odd one out — it is a brown alga (Phaeophyceae), not green.

   The trap is the same familiar name-list game: four correct entries plus one impostor from a different class. So four of the five are green algae.

   NCERT Class 11 Biology, page 26

8. Q8 Multi-statement analysis

   Gymnosperms: (i) ovules not enclosed by an ovary wall (ii) ovules exposed before and after fertilisation (iii) seeds are naked (iv) seeds are enclosed in fruits. How many are correct?

   1. 1.One
   2. 2.Two
   3. 3.ThreeCorrect answer
   4. 4.Four

   Why option 3 is the answer

   The trap: (i)–(iii) correct; enclosure of seeds in fruits is an ANGIOSPERM feature, so (iv) is wrong.

   What this is testing: what 'naked seed' really means, and whose feature that is.

   (i) is correct. Gymnosperm ovules are not enclosed by an ovary wall.
   (ii) is correct. The ovules stay exposed both before and after fertilisation.
   (iii) is correct. This is exactly why the seeds are called naked.
   (iv) is the trap. Enclosing seeds inside a fruit is an ANGIOSPERM feature — gymnosperm seeds are never covered by a fruit.

   So three statements are correct.

   Gymno- means naked, and it refers to the seed. No ovary wall means no fruit, which is the whole distinction from angiosperms.

   NCERT Class 11 Biology, page 32

9. Q9 Assertion and Reason

   AssertionBrown algae store food as laminarin or mannitol.

   ReasonThe brown-algal cell wall is cellulosic with an outer coating of algin.

   1. 1.Both A and R are true and R is the correct explanation of A
   2. 2.Both A and R are true but R is not the correct explanation of ACorrect answer
   3. 3.A is true but R is false
   4. 4.A is false but R is true

   Why option 2 is the answer

   The trap: Both describe features of the brown-algal body; the wall composition is a parallel property and does not explain the nature of the stored food.

   What this is testing: whether cell-wall composition explains what a brown alga stores as food.

   A says brown algae store food as laminarin or mannitol. True.
   R says the brown-algal cell wall is cellulosic with an outer coating of algin. True.

   Both true, but R does not explain A, so the code is (2). The wall coating and the stored carbohydrate are two separate facts about the same body — one does not cause the other.

   NCERT Class 11 Biology, page 27

10. Q10 Assertion and Reason

    AssertionSpirogyra shows isogamous sexual reproduction.

    ReasonSpirogyra is a filamentous green alga with spirally coiled chloroplasts.

    1. 1.Both A and R are true and R is the correct explanation of A
    2. 2.Both A and R are true but R is not the correct explanation of ACorrect answer
    3. 3.A is true but R is false
    4. 4.A is false but R is true

    Why option 2 is the answer

    The trap: Both statements describe Spirogyra; its filamentous form and coiled chloroplasts are a parallel structural feature that does not explain its isogamy.

    What this is testing: whether Spirogyra's cell shape explains its mode of sexual reproduction.

    A says Spirogyra shows isogamous sexual reproduction. True.
    R says Spirogyra is a filamentous green alga with spirally coiled chloroplasts. True.

    Both true, but R does not explain A, so the code is (2). The spiral chloroplast is an identifying feature of the cell, not the reason its gametes happen to be similar in size.

    NCERT Class 11 Biology, page 24

11. Q11 Assertion and Reason

    AssertionCyanobacteria (blue-green algae) are still classified under Algae.

    ReasonMembers of Monera possessing cell walls have now been excluded from Plantae.

    1. 1.Both A and R are true and R is the correct explanation of A
    2. 2.Both A and R are true but R is not the correct explanation of A
    3. 3.A is true but R is false
    4. 4.A is false but R is trueCorrect answer

    Why option 4 is the answer

    The trap: A false — blue-green 'algae' are no longer algae; R is true.

    What this is testing: whether cyanobacteria still count as algae.

    A says cyanobacteria (blue-green algae) are still classified under Algae. False — they are now placed in Monera, not Plantae.
    R says members of Monera possessing cell walls have now been excluded from Plantae. True.

    A false and R true is code (4). The old label 'blue-green algae' survives in casual use, but modern classification moves them out of the plant kingdom entirely.

    NCERT Class 11 Biology, page 23

12. Q12 Assertion and Reason

    AssertionChlorella is used as a food supplement by space travellers.

    ReasonChlorella is a microscopic, free-floating green alga of the class Chlorophyceae.

    1. 1.Both A and R are true and R is the correct explanation of A
    2. 2.Both A and R are true but R is not the correct explanation of ACorrect answer
    3. 3.A is true but R is false
    4. 4.A is false but R is true

    Why option 2 is the answer

    The trap: Both statements are about Chlorella, but its classification as a green alga is a parallel fact and does not explain its use as a food supplement (its high protein content does).

    What this is testing: whether classifying Chlorella explains why it is used as food.

    A says Chlorella is used as a food supplement by space travellers. True.
    R says Chlorella is a microscopic, free-floating green alga of the class Chlorophyceae. True.

    Both true, but R does not explain A, so the code is (2). Being a green alga is a classification fact; the actual reason Chlorella is chosen as food is its high protein content, which R never mentions.

    NCERT Class 11 Biology, page 26

13. Q13 Assertion and Reason

    AssertionThe main plant body of a bryophyte is a gametophyte.

    ReasonThis gametophyte bears the multicellular sex organs — the antheridia and archegonia.

    1. 1.Both A and R are true and R is the correct explanation of A
    2. 2.Both A and R are true but R is not the correct explanation of ACorrect answer
    3. 3.A is true but R is false
    4. 4.A is false but R is true

    Why option 2 is the answer

    The trap: Both statements are about the bryophyte gametophyte; bearing the sex organs is a parallel property and is not the reason it is the main plant body.

    What this is testing: whether bearing sex organs is why the gametophyte is the main plant body.

    A says the main plant body of a bryophyte is a gametophyte. True.
    R says this gametophyte bears the multicellular sex organs, the antheridia and archegonia. True.

    Both true, but R does not explain A, so the code is (2). Bearing the sex organs is simply another feature of the gametophyte; it is not the reason the gametophyte, rather than the sporophyte, is the dominant body.

    NCERT Class 11 Biology, page 29

14. Q14 Assertion and Reason

    AssertionRed algae reproduce sexually by non-motile gametes.

    ReasonRed algae also reproduce asexually by non-motile spores.

    1. 1.Both A and R are true and R is the correct explanation of A
    2. 2.Both A and R are true but R is not the correct explanation of ACorrect answer
    3. 3.A is true but R is false
    4. 4.A is false but R is true

    Why option 2 is the answer

    The trap: Both describe non-motile reproductive cells in red algae; the asexual spores are a parallel fact and do not explain why the gametes are non-motile.

    What this is testing: whether an asexual fact explains a sexual one in red algae.

    A says red algae reproduce sexually by non-motile gametes. True.
    R says red algae also reproduce asexually by non-motile spores. True.

    Both true, but R does not explain A, so the code is (2). The two statements describe two separate modes of reproduction in the same alga; the asexual one does not cause or explain the sexual one.

    NCERT Class 11 Biology, page 28

15. Q15 Assertion and Reason

    AssertionPteridophytes possess xylem and phloem.

    ReasonIn pteridophytes the dominant sporophyte is differentiated into true roots, stem and leaves.

    1. 1.Both A and R are true and R is the correct explanation of A
    2. 2.Both A and R are true but R is not the correct explanation of ACorrect answer
    3. 3.A is true but R is false
    4. 4.A is false but R is true

    Why option 2 is the answer

    The trap: Both statements describe the pteridophyte sporophyte; organ differentiation is a parallel structural feature and does not by itself explain the presence of vascular tissue.

    What this is testing: whether organ differentiation explains the presence of vascular tissue.

    A says pteridophytes possess xylem and phloem. True.
    R says the dominant sporophyte is differentiated into true roots, stem and leaves. True.

    Both true, but R does not explain A, so the code is (2). Having distinct organs is a parallel structural feature; the vascular tissue running through those organs is a separate fact, not something the organ differentiation by itself explains.

    NCERT Class 11 Biology, page 31

16. Q16 Assertion and Reason

    AssertionIn Pinus, male and female cones are borne on the same tree.

    ReasonIn Cycas, the male cones and the megasporophylls are borne on different plants.

    1. 1.Both A and R are true and R is the correct explanation of A
    2. 2.Both A and R are true but R is not the correct explanation of ACorrect answer
    3. 3.A is true but R is false
    4. 4.A is false but R is true

    Why option 2 is the answer

    The trap: Both statements concern the distribution of cones in gymnosperms; the contrasting Cycas condition is a parallel fact and does not explain the Pinus arrangement.

    What this is testing: whether the Cycas condition explains why Pinus is arranged differently.

    A says in Pinus, male and female cones are borne on the same tree. True.
    R says in Cycas, the male cones and the megasporophylls are borne on different plants. True.

    Both true, but R does not explain A, so the code is (2). The Cycas arrangement is simply the opposite, contrasting case — it does not give the reason Pinus itself is monoecious.

    NCERT Class 11 Biology, page 33

17. Q17 Assertion and Reason

    AssertionAngiosperm seeds are enclosed in fruits.

    ReasonAngiosperms are divided into two classes, the dicotyledons and the monocotyledons.

    1. 1.Both A and R are true and R is the correct explanation of A
    2. 2.Both A and R are true but R is not the correct explanation of ACorrect answer
    3. 3.A is true but R is false
    4. 4.A is false but R is true

    Why option 2 is the answer

    The trap: Both are features of the angiosperms; the dicot/monocot division is a parallel classification fact and does not explain why the seeds are enclosed in fruits.

    What this is testing: whether the monocot/dicot split explains why angiosperm seeds sit inside fruits.

    A says angiosperm seeds are enclosed in fruits. True.
    R says angiosperms are divided into two classes, the dicotyledons and the monocotyledons. True.

    Both true, but R does not explain A, so the code is (2). The monocot-dicot division is a separate classification fact; it says nothing about why the ovary develops into a fruit around the seed.

    NCERT Class 11 Biology, page 34

18. Q18 Statement I and Statement II

    Statement IBentham and Hooker gave a phylogenetic system based on evolutionary relationships.

    Statement IINatural systems of classification use only gross external morphology.

    1. 1.Both Statement I and Statement II are correct
    2. 2.Both Statement I and Statement II are incorrectCorrect answer
    3. 3.Statement I is correct but Statement II is incorrect
    4. 4.Statement I is incorrect but Statement II is correct

    Why option 2 is the answer

    The trap: Both incorrect: their system was NATURAL, and natural systems also use internal features.

    What this is testing: what kind of system Bentham and Hooker actually gave, and what natural systems use.

    Statement I says Bentham and Hooker gave a phylogenetic system based on evolutionary relationships. Incorrect — their system was NATURAL, not phylogenetic.
    Statement II says natural systems of classification use only gross external morphology. Incorrect — natural systems also use internal features, unlike artificial systems.

    Both statements are incorrect, so the answer is (2). Each line borrows a true idea from the chapter and attaches it to the wrong system.

    NCERT Class 11 Biology, page 23

19. Q19 Statement I and Statement II

    Statement ICytotaxonomy is based on the chemical constituents of the plant.

    Statement IINumerical taxonomy gives equal importance to each character.

    1. 1.Both Statement I and Statement II are correct
    2. 2.Both Statement I and Statement II are incorrect
    3. 3.Statement I is correct but Statement II is incorrect
    4. 4.Statement I is incorrect but Statement II is correctCorrect answer

    Why option 4 is the answer

    The trap: I incorrect (that describes chemotaxonomy); II correct.

    What this is testing: telling cytotaxonomy apart from chemotaxonomy.

    Statement I says cytotaxonomy is based on the chemical constituents of the plant. Incorrect — that description fits CHEMOTAXONOMY; cytotaxonomy uses chromosome number, structure and behaviour.
    Statement II says numerical taxonomy gives equal importance to each character. Correct.

    So I is incorrect and II is correct, giving (4).

    Cyto- for chromosomes, chemo- for chemistry, numerical for computed characters. The prefix names the evidence.

    NCERT Class 11 Biology, page 24

20. Q20 Statement I and Statement II

    Statement IIn mosses the leafy stage develops from the secondary protonema.

    Statement IIThe moss sporophyte consists of foot, seta and capsule.

    1. 1.Both Statement I and Statement II are correctCorrect answer
    2. 2.Both Statement I and Statement II are incorrect
    3. 3.Statement I is correct but Statement II is incorrect
    4. 4.Statement I is incorrect but Statement II is correct

    Why option 1 is the answer

    The trap: Both statements are correct.

    What this is testing: two plain facts about the moss sporophyte and gametophyte.

    Statement I says the leafy stage develops from the secondary protonema. Correct.
    Statement II says the moss sporophyte consists of foot, seta and capsule. Correct.

    Both statements are correct, so the answer is (1). Neither line is reversed, so treat this as straight recall rather than a hunt for an error.

    NCERT Class 11 Biology, page 30

21. Q21 Match the columns

    Match the group with its main plant body:

    Column I	Column II
    (a) Bryophyte	(ii) diploid vascular sporophyte
    (b) Pteridophyte	(iii) sporophyte with naked seeds
    (c) Gymnosperm	(iv) thalloid gametophyte (Marchantia)
    (d) Liverwort	(i) haploid gametophyte

    1. 1.(a)-(ii), (b)-(i), (c)-(iii), (d)-(iv)
    2. 2.(a)-(i), (b)-(ii), (c)-(iii), (d)-(iv)Correct answer
    3. 3.(a)-(i), (b)-(ii), (c)-(iv), (d)-(iii)
    4. 4.(a)-(iv), (b)-(ii), (c)-(iii), (d)-(i)

    Why option 2 is the answer

    The trap: Bryophyte-haploid gametophyte, Pteridophyte-vascular sporophyte, Gymnosperm-naked-seed sporophyte, Liverwort-thalloid gametophyte.

    What this is testing: what the main plant body actually is in each group.

    A bryophyte's main body is a haploid gametophyte, a pteridophyte's is a diploid vascular sporophyte, a gymnosperm's is a sporophyte bearing naked seeds, and a liverwort (a type of bryophyte) has a thalloid gametophyte as in Marchantia. That gives (a)-(i), (b)-(ii), (c)-(iii), (d)-(iv) — option 2.

    The trap: option 4 reverses the whole list, so check the group you know best — for instance, that the pteridophyte body is a sporophyte — before trusting the rest.

    NCERT Class 11 Biology, page 29

22. Q22 Match the columns

    Match the algal class with its habitat (Table 3.1):

    Column I	Column II
    (a) Chlorophyceae	(iv) fresh (some)/brackish/salt (most)
    (b) Phaeophyceae	(i) fresh/brackish/salt
    (c) Rhodophyceae	(iii) excluded from algae
    (d) Cyanobacteria	(ii) fresh (rare)/brackish/salt

    1. 1.(a)-(i), (b)-(ii), (c)-(iv), (d)-(iii)Correct answer
    2. 2.(a)-(ii), (b)-(i), (c)-(iv), (d)-(iii)
    3. 3.(a)-(i), (b)-(iv), (c)-(ii), (d)-(iii)
    4. 4.(a)-(iv), (b)-(ii), (c)-(i), (d)-(iii)

    Why option 1 is the answer

    The trap: Chlorophyceae-fresh/brackish/salt, Phaeophyceae-fresh(rare)/brackish/salt, Rhodophyceae-fresh(some)/salt(most), cyanobacteria-excluded.

    What this is testing: Table 3.1's habitat data for each algal class.

    Chlorophyceae occurs in fresh, brackish and salt water, Phaeophyceae occurs rarely in fresh water but commonly in brackish and salt water, Rhodophyceae occurs in a few fresh-water forms but is mostly marine, and cyanobacteria are excluded from the algae altogether. That gives (a)-(i), (b)-(ii), (c)-(iv), (d)-(iii) — option 1.

    The trap: option 4 reverses the order of the three algal rows, so anchor the cyanobacteria row — always 'excluded' — first, since it never changes.

    NCERT Class 11 Biology, page 27

23. Q23 Match the columns

    Match the reproductive structure with the group producing it:

    Column I	Column II
    (a) zoospores	(iv) gymnosperm male gametophyte
    (b) gemmae	(iii) algae (asexual)
    (c) prothallus	(ii) liverwort (asexual)
    (d) pollen grain	(i) fern gametophyte

    1. 1.(a)-(ii), (b)-(iii), (c)-(i), (d)-(iv)
    2. 2.(a)-(iii), (b)-(i), (c)-(ii), (d)-(iv)
    3. 3.(a)-(iii), (b)-(ii), (c)-(i), (d)-(iv)Correct answer
    4. 4.(a)-(iii), (b)-(ii), (c)-(iv), (d)-(i)

    Why option 3 is the answer

    The trap: Zoospores-algal asexual, gemmae-liverwort asexual, prothallus-fern gametophyte, pollen-gymnosperm male gametophyte.

    What this is testing: which structure belongs to which group's reproduction.

    Zoospores are an algal asexual structure, gemmae are a liverwort asexual structure, the prothallus is a fern's gametophyte, and the pollen grain is a gymnosperm's male gametophyte. That gives (a)-(iii), (b)-(ii), (c)-(i), (d)-(iv) — option 3.

    The trap: option 2 swaps gemmae and the prothallus, so remember that gemmae are asexual buds while the prothallus is a full gametophyte generation.

    NCERT Class 11 Biology, page 24

24. Q24 Match the columns

    Match the example with its special feature:

    Column I	Column II
    (a) Chlorella	(ii) heterosporous
    (b) Sphagnum	(iii) strobilus, Sphenopsida
    (c) Selaginella	(i) protein-rich food supplement
    (d) Equisetum	(iv) peat

    1. 1.(a)-(iv), (b)-(i), (c)-(ii), (d)-(iii)
    2. 2.(a)-(i), (b)-(iv), (c)-(iii), (d)-(ii)
    3. 3.(a)-(i), (b)-(iv), (c)-(ii), (d)-(iii)Correct answer
    4. 4.(a)-(ii), (b)-(iv), (c)-(i), (d)-(iii)

    Why option 3 is the answer

    The trap: Chlorella-food supplement, Sphagnum-peat, Selaginella-heterosporous, Equisetum-strobilus/Sphenopsida.

    What this is testing: four separate 'special feature' facts, matched to their genus.

    Chlorella is a food supplement, Sphagnum gives peat, Selaginella is heterosporous, and Equisetum bears a strobilus and belongs to Sphenopsida. That gives (a)-(i), (b)-(iv), (c)-(ii), (d)-(iii) — option 3.

    The trap: option 4 reverses the whole order, so anchor the pair you know best — Selaginella as heterosporous — and check the rest against it.

    NCERT Class 11 Biology, page 26

25. Q25 Exception / incorrect

    Identify the INCORRECT pair (class – stored food):

    1. 1.Chlorophyceae – starch
    2. 2.Phaeophyceae – mannitol
    3. 3.Phaeophyceae – floridean starchCorrect answer
    4. 4.Rhodophyceae – floridean starch

    Why option 3 is the answer

    The trap: Brown algae store mannitol/laminarin, not floridean starch.

    What this is testing: which class stores which carbohydrate.

    Chlorophyceae stores starch, and Phaeophyceae stores mannitol — both correct pairs. Rhodophyceae genuinely stores floridean starch, so that pair is also correct. The incorrect pair is Phaeophyceae with floridean starch — brown algae store laminarin or mannitol, never floridean starch, which is a red-algal reserve food.

    The trap: floridean starch sounds generic enough to attach to any algal class, but it names one class only. So option 3 is incorrect.

    NCERT Class 11 Biology, page 27

26. Q26 Sequence / ordering

    Historical development of classification systems:

    1. 1.natural → artificial → phylogenetic
    2. 2.phylogenetic → natural → artificial
    3. 3.artificial → phylogenetic → natural
    4. 4.artificial → natural → phylogeneticCorrect answer

    Why option 4 is the answer

    The trap: Artificial (Linnaeus) → natural (Bentham & Hooker) → phylogenetic.

    What this is testing: the historical order in which classification systems appeared.

    The artificial system, given by Linnaeus, came first; the natural system, given by Bentham and Hooker, came next; phylogenetic systems, based on evolutionary relationships, came last, once evolutionary theory was established.

    The trap: other options place natural or phylogenetic systems first — remember that classification became more scientific over time, moving from a few convenient characters to full evolutionary relationships. So option 4 is correct.

    NCERT Class 11 Biology, page 23

27. Q27 NEET 2022

    Match the plant with the kind of life cycle it exhibits:

    Column I	Column II
    (a) Spirogyra	(i) Haplo-diplontic (leafy gametophyte dominant)
    (b) Fern	(iii) Diplontic (highly reduced gametophyte)
    (c) Funaria	(iv) Haplontic
    (d) Cycas	(ii) Haplo-diplontic (dominant sporophyte, free-living prothallus)

    1. 1.(a)-(iv), (b)-(ii), (c)-(i), (d)-(iii)Correct answer
    2. 2.(a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)
    3. 3.(a)-(ii), (b)-(iv), (c)-(iii), (d)-(i)
    4. 4.(a)-(iv), (b)-(iii), (c)-(i), (d)-(ii)

    Why option 1 is the answer

    The trap: Spirogyra (alga) is haplontic; the fern is haplo-diplontic, with a dominant sporophyte and a free-living prothallus gametophyte; Funaria (moss) is haplo-diplontic with the leafy gametophyte dominant; Cycas (gymnosperm) is diplontic with a highly reduced gametophyte.

    What this is testing: matching four plant groups to their life-cycle type, where two of them share the same answer.

    Spirogyra, a green alga, is haplontic — the dominant phase is the haploid gametophyte and the only diploid cell is the zygote. Both the fern and Funaria, the moss, are HAPLO-DIPLONTIC: each has an independent gametophyte and an independent sporophyte, so both generations are free-living. Cycas, a gymnosperm, is diplontic, with the sporophyte dominant and the gametophyte reduced to a few cells that never leave the parent plant.

    What separates the fern from Funaria is which generation dominates. In the moss it is the leafy gametophyte; in the fern it is the sporophyte, the plant you actually see, with the gametophyte reduced to a small free-living prothallus. Both are still haplo-diplontic.

    The trap: calling the fern diplontic because its sporophyte dominates. Dominance is not the test — independence is. A prothallus that lives on its own keeps the fern in the haplo-diplontic group alongside the bryophytes.

    NCERT Class 11 Biology, pages 24-33

28. Q28 NEET 2024

    Read the following statements and choose the set of correct statements. In the members of Phaeophyceae: (A) Asexual reproduction occurs usually by biflagellate zoospores (B) Sexual reproduction is by the oogamous method only (C) Stored food is in the form of carbohydrates, either mannitol or laminarin (D) The major pigments found are chlorophyll a, c, carotenoids and xanthophyll (E) Vegetative cells have a cellulosic wall, usually covered on the outside by a gelatinous coating of algin.

    1. 1.A, B, C and D only
    2. 2.B, C, D and E only
    3. 3.A, C, D and E onlyCorrect answer
    4. 4.A, B, D and E only

    Why option 3 is the answer

    The trap: (B) is the false statement: sexual reproduction in brown algae may be isogamous, anisogamous, or oogamous, not oogamous only. (A), (C), (D) and (E) all correctly describe Phaeophyceae.

    What this is testing: which single statement about Phaeophyceae is false among five.

    Statement (B) is false: sexual reproduction in brown algae may be isogamous, anisogamous OR oogamous, not oogamous only.

    Why the others are correct: asexual reproduction genuinely occurs by biflagellate zoospores (A), stored food genuinely is mannitol or laminarin (C), the major pigments genuinely include chlorophyll a, c, carotenoids and xanthophyll (D), and the cellulosic wall genuinely has an outer algin coating (E).

    The trap: (B) narrows a fact that is true in general — oogamy does occur in brown algae — into a false absolute by adding the word 'only', exactly the kind of restriction to watch for in a long list of statements.

    NCERT Class 11 Biology, page 27

29. Q29 NEET 2025

    Which is the correct sequence of events in the life cycle of a pteridophyte?

    1. 1.Prothallus stage → meiosis in spore mother cells → fertilisation → archegonia/antheridia form → antherozoids transferred to archegonia
    2. 2.Archegonia/antheridia form → meiosis in spore mother cells → prothallus stage → fertilisation → antherozoids transferred
    3. 3.Fertilisation → meiosis in spore mother cells → prothallus stage → archegonia/antheridia form → antherozoids transferred to archegonia
    4. 4.Meiosis in spore mother cells → prothallus stage → archegonia/antheridia form on the prothallus → antherozoids transferred to archegonia in water → fertilisationCorrect answer

    Why option 4 is the answer

    The trap: Meiosis in the spore mother cells produces spores that germinate into the prothallus (gametophyte); archegonia and antheridia then develop on it; antherozoids swim through water to the archegonia; fertilisation follows last.

    What this is testing: the correct order of events in a pteridophyte life cycle.

    Meiosis in the spore mother cells produces spores; these germinate into the prothallus (gametophyte); archegonia and antheridia then develop on the prothallus; antherozoids are transferred to the archegonia through water; and fertilisation happens last.

    The trap: other orderings put fertilisation early or put the prothallus stage before meiosis even occurs — anchor the sequence on meiosis producing the spores first and fertilisation, which needs water, coming only after the sex organs have formed. So option 4 is correct.

    NCERT Class 11 Biology, pages 31-32

30. Q30 NEET 2025

    Which is the correct sequence of events in the life cycle of a bryophyte?

    1. 1.Gametophyte attaches to substratum → antherozoids released into water → antherozoid fuses with egg → sporophyte forms → reduction division produces haploid sporesCorrect answer
    2. 2.Reduction division produces haploid spores → gametophyte attaches to substratum → antherozoids released → antherozoid fuses with egg → sporophyte forms
    3. 3.Antherozoid fuses with egg → gametophyte attaches to substratum → antherozoids released → sporophyte forms → reduction division
    4. 4.Sporophyte forms → gametophyte attaches to substratum → antherozoids released → antherozoid fuses with egg → reduction division

    Why option 1 is the answer

    The trap: The gametophyte first attaches to the substratum; antherozoids are then released into the surrounding water and swim to fertilise the egg; the resulting zygote develops into a sporophyte, which undergoes reduction division (meiosis) to produce haploid spores.

    What this is testing: the correct order of events in a bryophyte life cycle.

    The gametophyte first attaches to the substratum; antherozoids are then released into the surrounding water and swim to fertilise the egg; the resulting zygote develops into a sporophyte, which undergoes reduction division (meiosis) to produce haploid spores.

    The trap: other orderings place the sporophyte or the reduction division too early, before fertilisation has even happened — keep the order fixed as gametophyte, fertilisation, sporophyte, meiosis, spores. So option 1 is correct.

    NCERT Class 11 Biology, pages 29-30