During unfavourable conditions Chlamydomonas forms a colonial aggregate called

Palmitate stage

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Palmella stage

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Endospore stage

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Cyst stage

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Solution

The correct option is B Palmella stage
Under certain conditions, Chlamydomonas changes from a motile organism to a non-motile form referred to as palmella stage. In this non-motile phase, vegetative divisions are prominent and motility is suppressed until special motile reproductive cells are formed.

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