2) what portion of the cell is absent in rhizopus stolonifer with the exception of the reproductive cells?

Septa and the internal crosswalls.

Explanation:

Rhizopus stolonifer, also known as the black bread mold, is a fungus in the Mucoraceae family that causes soft rot in plants and fruits. This fungus is widely distributed worldwide and can often be viewed on bread and lemon surfaces. Unlike most fungi, Rhizopus stolonifer's cells lack the septa and the internal crosswalls.

the organisms are not adapted to live in some communities or habitats.