Question

The reduction division in the life cycle of Rhizopus occurs

• A. At the time of germination of zygospores
• B. During the formation of germ sporangium
• C. During asexual reproduction
• D. During the formation of gametangium

Answer 1

Answer: (A)

At the time of germination of zygospores

Rhizopus can reproduce sexually under unfavourable condition. When (+ and -) hyphae fuse and they produce structures called progametangia. Cell walls form to separate the tips of the progametangia into gametangia. Plasmogamy then occurs to form a Zygote(2n) and then zygospores form through karyogamy. Zygospores germinate meiotically by producing a long sporangiospores bearing a sporangium at the tips. Thus, the correct answer is A.