Paheli wrote a food chain in the following way: frog → eagle → insects → grass → snake

(d) The population of tiger decreases and the population of grass increases

(a) Grazing food chain and detritus food chain Grazing food chain Detritus food chain In this food chain, energy is derived from the Sun. In this food chain, energy comes from organic matter (or...

(c) Both have normal body temperature. 

(i), (iii) and (iv)

(ii) Grass, goat and human

Removal of lions from the above food chain will increase the number of deer to such an extent that they will eat up the whole grass. The density of producer...

Grass is producer, hawk and frog are carnivores (top and lower), rabbit and deer are herbivores. Since rabbit and deer are both herbivores, they belong to the same trophic level.

On taking this snake below a fan, it moves in the anticlockwise direction. This is because, here the air is moving downwards.

(d) Biomagnification is the phenomenon of increasing concentration of compound in the tissue of organism, as the compound passes up a food chain, usually as a result of food intake....