In how many stages does sexual reproduction occur in fungi?

Claviceps purpurea grows as a parasite:

Basidiomycetes include ..........

Neurospora,an ascomycetes fungus,has been used as a biological tool to understand the mechanism of plant genetics in much the same way as Drosophila has been used to study animal genetics. What makes Neurospora so important as a genetic tool?

Identify the organism shown in the given figure.

Identify the organism given below.