MODEL PAPER 6 — BIOLOGY STD 11 Science — Question

Frogs are beneficial for mankind in various ways. Some are as follows:
i. Frogs eat many insects and pests. Thus, frogs help prevent damage to crops.
ii. Frogs are important links in the food chain and thus are important component of the ecosystem for maintaining ecological balance.
iii. In some countries, the muscular legs of frog are used as food by man.