By which of the following methods an algae can perennate under unfavourable condition?

Zoospores

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Palmella stage

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Akinete

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Both B and C

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Solution

The correct option is D Both B and C
Zoospore is a motile asexual spore that uses a flagellum for locomotion. Also called as swarm spore, these spores are created by some algae, bacteria and fungi to propagate themselves.
The freshwater and subaerial algae are unprotected and frequently exposed to risk of desiccation and extremes of temperature. Marine algae live in conditions where variations in external environmental conditions of life are rare but still they are exposed to tidal fluctuations. The main methods of perennation in freshwater and subaerial algae are akinetes, aplanospores, palmella stage, cysts, oospore, hormospores, hypnospores and tubers.

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