Question

Assertion : In pteridophytes, zygote produces a multicellular sporophyte.
Reason : Sporophyte is the dominant phase in life cycle of pteridophytes.

• A. If both assertion and reason are true and reason is the correct explanation of assertion
• B. If both assertion and reason are true but reason is not the correct explanation of assertion
• C. If assertion is true but reason is false
• D. If both assertion and reason are false

Answer 1

Answer: (B)

In pteridophytes, gametophytes bear male and female sex organs called antheridia and archegonia, respectively. Water is required for transfer of antherozoids - the male gametes are released from the antheridia, to the mouth of archegonium. Fusion of male gamete with the egg present in the archegonium results in the formation of zygote. Zygote thereafter produces a multicellular welldifferentiated sporophyte which is the dominant phase of the pteridophytes.