Question

what is fungi what are its main characteristics

Answer 1

Fungi are microorganisms. They are a group of single- celled or multi-celled organisms. All fungi lack chlorophyll hence they are heterotrops[hetero-(an) other ;trope-nutrition).
Examples-Yeasts and moulds

Answer 2

The kingdom Fungi includes a vast variety of organisms such asmushrooms, yeast, and mold, made up of feathery filaments called hyphae (collectively called mycelium). Fungiare multicellular and eukaryotic. They are also heterotrophs, and gain nutrition through absorption.