Rewrite the wrong sentence by substituting the correct word. 

Whales have gills to breathe.

Rewrite the wrong sentence by substituting the correct word.

The place where an organism lives in nature is called its environment.

Rewrite the wrong sentence by substituting the correct word.

Animals living on trees are called aerial animals.

Rewrite the wrong sentence by substituting the correct word. 

Cone-shaped trees grow in desert habitat.

Complete the following table:

Give reasons for the following:

In desert plants, the leaves are modified into spines.

Give reasons for the following:

A fish does not survive outside water.

Give reasons for the following: 

Trees in mountain habitats are cone-shaped.

Complete the statement given under the picture A .