Question

Examine the given figure and select the option that correctly identifies all the four parts (A, B, C and D).

• A. A-Archegoniophore, B-Female thallus, C-Gemma cup, D-Rhizoids
• B. A-Archegoniophore, B-Female thallus, C-Bud, D-Gemma cup
• C. A-Seta, B-Sporophyte, C-Protonema, D-Rhizoids
• D. A-Male thallus, B-Antheridiophore, C-Globule, D-Adventitious roots

Answer 1

The correct option is A A-Archegoniophore, B-Female thallus, C-Gemma cup, D-Rhizoids

It is a liverwort because it gives the appearance of a liver. Examples are Riccia, Marchantia.

A. Archegoniphores: The female reproductive organs are 'archegonia'. They are borne on special stalked branches called archegoniphores. Each archegonium is differentiated into neck and venter.

B. Female thallus: The vegetative body of Marchantia is a dorsiventral lobed thallus. The upper surface of the thallus is smooth.

C. Gemma cup: Asexual reproduction occurs by the formation of gemmae. They are multicellular, green, and biconvex lens-shaped bodies produced in gemma cups.

D. Rhizoids: The lower surface bears a large number of unicellular and unbranched rhizoids which penetrate into the soil.

So, the correct answer is 'A- Archegoniophore, B-Female thallus, C-Gemma cup, D-Rhizoids'.