Some organisms can respire even in the absence of O₂. This process is called,

Study of relation between organism and environment is

Products of respiration are

Cockroaches , hide as soon as the light is switched on. This is an example of

Building block of an organism is known as

Locomotary organ of fish is

Plants grows towards light. This phenomenon is called

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

Plants produce gums and resins in the body through

Which of the following is a correct statement about growth?