What is the cell wall of fungi composed of?

They do not perform photosynthesis and obtain nutrition through absorption.

Yeast is classified under the class:

$A.$ Fungi are parasitic or saprophytic.
$R.$ Some fungi obtain nutrients from living organisms,while others obtain them from decaying organic matter.

Powdery mildews of crops are caused by

$A$ fungus contains cells with two nuclei from different genomes. The nuclei do not fuse but divide independently to form a dikaryotic secondary mycelium. The fungus belongs to