Which Stage is the Only Diploid Stage in the Zygote

Question

Which stage is the only diploid stage in the zygote fungus life cycle?  
A) Gametangia
B) Mycelium
C) Immature zygospore
D) Spores
E) Zygote

Accepted Answer

The zygote is the only diploid stage in the zygote fungus life cycle. It is formed by the fusion of haploid gametes during fertilization. The zygote then undergoes meiosis to produce haploid spores, which develop into the mycelium (vegetative, multicellular body of the fungus). The mycelium can produce haploid gametangia, which fuse to form a zygote and start the cycle again.