Home Biology The Living World Previous Year Questions In which group of organisms the cells walls …
Biology The Living World Previous Year Questions Single Correct MCQ
Published on: August 12, 2026

In which group of organisms the cells walls form two thin overlapping shells which fit together?

A
Slime moulds
B
Chrysophytes
C
Euglenoids
D
Dinoflagellates

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The correct answer is:
D

Dinoflagellates have a cell wall made of cellulose plates that form two thin overlapping shells called thecae. These plates fit together like armor. Slime moulds lack a true cell wall. Chrysophytes and euglenoids do not show this characteristic structure

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