Carrying capacity of earth is

Photosynthetic yield is maximum at the

In a sea shore, the benthic animals live in sandy, muddy and rocky substrata and accordingly developed the following adaptations.

$(a)$ Burrowing

$(b)$ Building cubes

$(c)$ Holdfasts / peduncle

Find the suitable substratum against each adaptation.

Soil conservation can be best achieved by having

When two related populations occupy geographically or spatially separate areas, they are called

The branch of Botany dealing with the distribution of plants on the earth's surface is called