Question

The prothallus of fern is

• A. Heart-shaped
• B. Dorsiventral
• C. Green
• D. All of the above

Answer 1

The correct option is D All of the above

Prothallus of fern is flat, green, autotrophic, cordate (heart shaped), dorsiventral, about 1/8 to 113 inch in size (5-l0mm), free living independent, nonvascular gametophyte. Prothallium or prothallus is usually the gametophyte stage in the life cycle. The prothallium develops from a germinating spore. It is a short-lived structure, typically 2-5 millimeters wide, with a number of rhizoids (root-like hairs) growing underneath, and the sex organs: archegonium (female) and antheridium (male).