Q.

Which one of these does not reproduce by fragmentation?

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a

Fucus

b

Yeast

c

Algae

d

Spirogyra

answer is A.

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Detailed Solution

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Yeast does not reproduce by fragmentation; it is propagated by budding.

Most of the species of Fucus reproduce only by fragmentation. 

Many small algae reproduce asexually by ordinary cell division or by fragmentation, whereas larger algae reproduce by spores.

In spirogyra, asexual reproduction takes place by fragmentation, in which the filament breaks into several pieces. Each piece grows as a new individual. 

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