In a pond, we see plants which are free-floating; rooted–submerged; rooted emergent; rooted with floating leaves. Write the type of plants against each of them.

In a seashore, 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.

Categorise the following plants into hydrophytes, halophytes, mesophytes and xerophytes. Give reasons for your answers.

a. Salvinia

b. Opuntia

c. Rhizophora

d. Mangifera

The density of a population in a habitat per unit area is measured in different units. Write the unit of measurement against the following:

a. Bacteria _______________

b. Banyan _______________

c. Deer _______________

d. Fish _______________

a. Label the three tiers 1, 2, 3 given in the above age pyramid.

b. What type of population growth is represented by the above age pyramid?