Breathing and Exchange of Gases — BIOLOGY STD 11 Science — Question

$(i)$ They are commonly known as imperfect fungi because only the asexual or vegetative phases of these fungi are known.

$(ii)$ They grow in soil, on logs and tree stumps and

$(iii)$ Live inside plant bodies as parasites, e.g., rusts and smuts

$(iv)$ Some common members are Agaricus, Ustilago and Puccinia.

$R -$ In $C_3$ plants $CO_2$ occurs in mesophyll cells and bundle sheath cells.