Plants grows towards light. This phenomenon is called

Locomotary organ of fish is

Which of the following organism have a short life span?

The ultimate source of energy is

Chief producer in an ecosystem is 

Animals that eat plants as well as animal matter are called :

Study of relation between organism and environment is

Organism which needs oxygen for respiration are called.

Conversion of food in to energy takeplace by the process of

If you breath in a glass  containing lime water , it turns milky because of the presence of the gas.