Question

During sexual reproduction in Rhizopus, a cross-wall appears at the base of two swollen hyphae, which have come together, enclosing several nuclei in each swollen part. The swollen part formed is called

• A. Gametangium
• B. Progametangium
• C. Sporangium
• D. Columella

Answer 1

The correct option is A Gametangium

During sexual reproduction in Rhizopus, two hyphae of same mycelia or different mycelia come together. Gradually the tips of the hyphae swells due to the accumulation of protoplasm. It results the formation of swollen reproductive structure called progametangia. In the progametangia, at the base a cross wall is formed. Due to this, progametangium, is differentiated into an upper gametangium and lower suspensor.

So the correct option is 'Gametangium'.