Answer the following questions briefly.
(i) Define an ecosystem.
(ii) What factors are responsible for the distribution of plants and animals in India?
(iii) What is a bio-reserve? Give two examples.
(iv) Name two animals having habitat in tropical and montane type of vegetation.
Chemical messengers responsible for control and coordination in plants and animals are:
Chemical messengers responsible for control and coordination in plants and animals are called ___
In both plants and animals _________ are responsible for the transition between phases of life cycle.