Question

Which of the given statements is wrong?

• A. Sporangiospores borne in the sporangium of Rhizopus are diploid structures
• B. Rhizopus belongs to the class Zygomycetes.
• C. Dominant phase in the life cycle of Chlamydomonas is haploid.
• D. Zoospores of Chlamydomonas are haploid.

Answer 1

Answer: (A)

Sporangiospores borne in the sporangium of Rhizopus are diploid structures

Answer 2

In Rhizopus, plant body is haploid and it is the dominant phase in its life cycle. The plant body is mycelial, coenocytic and branched. Three types of hypae are seen in Rhizopus: stoloniferous hypae, rhizoidal hyphae and sporangiophores. Sporangiophores are erect, aerial and unbranched hyphae which grow upwards in tufts (3-5) from the stolons. They bear terminal sporangia and so are reproductive in function. They bear multinucleate non-motile spores, called sporangiospores, which are haploid in nature and under favourable conditions give rise to new plants.