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In Ulothrix/Spirogyra, reduction division (meiosis) occurs at the time of
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- gamete formation
- zoospore formation
- zygospore germination
- vegetative reproduction
Correct Option: C
Plant body of Ulothrix and Spirogyra is gametophyte (haploid), they produce zoogametes(n) which fuse to form zygospore (2n) diploid, which is a resting spore. Under favourable condition zygospore undergoes reductional division or meiosis to produce zoospores which give rise to new plant.
