A prothallus is:

Biology Plant Kingdom NCERT Examplar Single Correct MCQ

Published by: CGP EDU Academic Team

Published on: August 21, 2026

A prothallus is:

A structure in pteridophytes formed before the thallus develops

A sporophytic free living structure formed in pteridophytes

A gametophyte free living structure formed in pteridophytes

A primitive structure formed after fertilisation in pteridophytes.

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The correct answer is:

Prothallus is usually a gametophytic stage in the life of a Pteridophyte. Spore germinates to form a prothallium, it is short-lived inconspicuous heart-shaped structure with a number of rhizoids developed beneath and sex organs, archegonium and antheridium.

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