A) torulla stage is found in Rhizopus
B) it reproduces parthenogenetically
C) two compatible opposite strains come close and their swollen ends join to form zygospore
D) all of the above
Correct Answer: C
Solution :
Few species of Rhizopus are homothallic (R. sexualis) while others are heterothallic (R. stolonifer). In heterothallic species the mycelia of two different mating type labeled as plus (+) and minus (-) strain fuse together (gametangial copulation). The fusing gametangia are multinucleate and distinct genetically.
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