2. club fungi
explanation:
Corn smut is caused by Ustilago maydis while wheat rust is caused by Puccinia triticina. Both Ustilago maydis and Puccinia triticina are classified under division Basidiomycota. Basidiomycota is also called as club fungi. These fungi form specific club-shaped fruiting bodies called basidia. Basidia are the site for the formation of basidiospores.
Cells don't grow very big because they have to be able to diffuse through material easily. Also, when cells are small and plentiful they are easy to replace when damaged.
Their purpose is reproduction.
Answer:
scientific theories must be tested by more than one individual multiply times for it to become scientific law
