Published by:
CGP EDU Academic Team
Published on: August 12, 2026
Given figure is of a filamentous blue-green algae. Identify the algae and choose the option that is correct for
A
, -Gelidium, -Volvox, -Chara, -Nostoc,
B
and -Vegetative cell, -Somatic cell, -Mucilaginous sheath, -Heterocyst,
C
in the figure. 
-Heterocyst -Mucilaginous sheath -Heterocyst -Mucilaginous sheath
-Heterocyst -Mucilaginous sheath -Heterocyst -Mucilaginous sheath
Text Solution
Verified by ExpertsThe correct answer is:
D
Nostoc is a filamentous blue-green algae (cyanobacterium). It has specialized cells called heterocysts for nitrogen fixation. The colony is surrounded by a mucilaginous sheath for protection.
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