Question

Directions: Choose the correct option:
Assertion $\left(A\right)$: In ferns, the diploid cells of the sporophyte directly give rise to the diploid gametophyte
Reason $\left(R\right)$: Ferns reproduce by spore formation and gametic fusion

Answer 1

Correct answer: (b) Both assertion$\left(A\right)$ and reason$\left(R\right)$ are true, but reason$\left(R\right)$ is not the correct explanation for assertion.

• Apogamy is the development of haploid sporophytes without gametes or fertilisation from haploid cells of the gametophyte.
• In sexual reproduction, the sporophytes bear sporangia that are subtended by leaf-like appendages called sporophylls.
• The sporangia produce spores by meiosis in spore mother cells.
• The spores germinate to give rise to free-living gametophytes called prothallus.
• The prothallus bears the male and female reproductive organs that release the male and female gametes.
• Fusion of male and female gametes result in the formation of zygote.
• Zygote thereafter produces a multicellular well-differentiated sporophyte.
• Hence, the correct option is (b).