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NEET2025Biology
Q.

Given below are the stages in the life cycle of pteridophytes. Arrange the following stages in the correct sequence.

A. Prothallus stage

B. Meiosis in spore mother cells

C. Fertilisation

D. Formation of archegonia and antheridia in gametophyte.

E. Transfer of antherozoids to the archegonia in presence of water.

Choose the correct answer from the options given below:

  1. A

    E, D, C, B, A

  2. B

    B, A, D, E, C

  3. C

    B, A, E, C, D

  4. D

    D, E, C, A, B

Solution

Following the alternation of generations in pteridophytes:

  1. B — meiosis in spore mother cells produces haploid spores.
  2. A — spores germinate into the prothallus (gametophyte).
  3. D — the prothallus develops antheridia and archegonia.
  4. E — antherozoids swim to the archegonia in a film of water.
  5. C — fertilisation produces the zygote, starting the sporophyte generation again.

Correct order: B A D E C.

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