Question

A plant in which sporophytic generation is represented by zygote is

• A. Pinus
• B. Selaginella
• C. Chlamydomonas
• D. Dryopteris.

Answer 1

The Correct Option is C

The question asks us to identify the plant in which the sporophytic generation is represented by the zygote. Let's analyze each option:

1. Pinus: In the life cycle of Pinus, a type of gymnosperm, the sporophytic generation is the dominant phase, which is represented by the adult plant itself. Therefore, the zygote grows into the sporophyte, but the zygote itself is not the sporophytic generation.
2. Selaginella: This is a type of pteridophyte, which exhibits a dominant sporophytic generation. Like Pinus, the sporophyte in Selaginella is represented by the adult plant, not merely the zygote.
3. Chlamydomonas: This is a type of unicellular green algae. In its life cycle, the zygote represents the sporophytic generation. The zygote undergoes meiosis to produce haploid cells that represent the gametophytic generation.
4. Dryopteris: This is also a pteridophyte like ferns, where the dominant phase is the sporophyte, represented by the adult fern plant, not just the zygote.

Thus, in the life cycle of Chlamydomonas, the zygote represents the sporophytic generation. This is because, in Chlamydomonas, the zygote is a diploid structure that later undergoes meiosis to produce haploid spores, starting the gametophytic generation.

Conclusion: The correct answer is Chlamydomonas.