100 zygospores,alternating with empty cells i | vedclass

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(B) In Spirogyra,conjugation is of two types: lateral and scalariform. Lateral conjugation occurs between adjacent cells of the same filament,resultin

Vedclass · Accepted Answer

Lateral,$100$

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(B) In Spirogyra,conjugation is of two types: lateral and scalariform. Lateral conjugation occurs between adjacent cells of the same filament,resulting in empty cells alternating with zygospores. Scalariform conjugation occurs between cells of two different filaments,resulting in zygospores in one of the filaments while the other becomes empty. Since the question specifies that zygospores alternate with empty cells within the same filament,it refers to lateral conjugation. Each zygospore undergoes meiosis to produce $4$ haploid nuclei. Out of these $4$ nuclei,$3$ degenerate and only $1$ remains functional to form a germ tube,which develops into a new daughter filament. Therefore,$100$ zygospores will produce $100$ new daughter filaments.

Column-$I$	Column-$II$
$(A)$ Blue-green algae	$(p)$ Chlamydomonas
$(B)$ Unicellular algae	$(q)$ Spirogyra
$(C)$ Filamentous algae	$(r)$ Volvox
$(D)$ Colonial algae	$(s)$ Nostoc

$100$ zygospores,alternating with empty cells in Spirogyra,are formed under ................. conjugation and the total number of daughter filaments formed will be ..........................

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Select the correct option by matching Column-$I$ with Column-$II$.
Column-$I$ Column-$II$
$(A)$ Blue-green algae $(p)$ Chlamydomonas
$(B)$ Unicellular algae $(q)$ Spirogyra
$(C)$ Filamentous algae $(r)$ Volvox
$(D)$ Colonial algae $(s)$ Nostoc

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