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Heterocysts occur in...

Heterocysts occur in

A

Chlorophyceae

B

Phaeophyceae

C

Cyanophyceae//cyanobacteria//Nostoc

D

Rhodophyceae.

Text Solution

Verified by Experts

The correct Answer is:
C
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[A] : Heterocyst formation increases under conditions of low light intensities . [R] : The increase in the amount of phosphate in the medium leads to increase in heterocyst production .

Which of the following statements are true about heterocyst? 1. They are formed in blue - green algae. 2. Heterocysts are nitrogen - fixing cells. 3. Heterocyts are formed during nitrogen starvation . 4. Anabaena and Nostoc are examples of heterocyst forming bacteria.

Nitrogen fixation by Nostoc /Anabaena takes place in (a) Heterocysts (b) Akinetes (c) Hormogones (d) Vegetative cells.