Give biological reason for the following statements :
In some xerophytes, leaves are modified into spines.

Leaves are modified into spines in

Leaves are modified into spines in

Leaves become modified into spines in :-

Leaves become modified into spines in :-

Leaves become modified into spines in :-

Give biological explanations for the following statements: A Bat is a Mammal.

Give biological reason for the following statement The birth rate in India is very high.

Give biological reason for the following statement Cutting of trees should be discouraged.

Give biological reason for the following statements : Plants growing in fertilized soil are often found to wilt if the soil is not adequately watered.

Give biological reason for the following statement: Some women have facial hair like beard and moustache.