Home Biology Biological Classification Introduction and Kingdom–Monera Heterocysts, specialised for nitrogen fixati…
Biology Biological Classification Introduction and Kingdom–Monera Single Correct MCQ
Published on: August 11, 2026

Heterocysts, specialised for nitrogen fixation, occur in certain

A
Red algae (Batrachospermum)
B
Green algae (Spirogyra)
C
Blue-green algae (Anabaena)
D
Brown algae (Laminaria)

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The correct answer is:
C

Heterocysts are specialized cells found in certain cyanobacteria (blue-green algae).

They are responsible for nitrogen fixation.

Example: Anabaena.

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