Which organism has great importance in genetics?

In which of the following is the mycelium aseptate and coenocytic?

Heterotrophic and absorptive type of nutrition is found in ...........

There is a myth that immediately after heavy rains in the forest, mushrooms appear in large numbers and form a very large ring or circle, which may be several metres in diameter. These are called "fairy rings". Can you explain this myth of fairy rings in biological terms? Discuss the mycelial structure in $Agaricus$ and its soil-borne nature.

Which of the following class of fungi is being described by the given statements?
$(i)$ They are found in aquatic habitats and on decaying wood in moist and damp places.
$(ii)$ Mycelium is aseptate and coenocytic.
$(iii)$ Asexual reproduction takes place by zoospores (motile) or by aplanospores (non-motile).
$(iv)$ Some common examples are Mucor,Rhizopus and Albugo.

Fungi that require two different hosts to complete their life cycle are called .........