Define the following terms:
(a) Symbiosis (b) Pheromones (c) Epiphytes.

Explanation

(a) Symbiosis: Beneficial interspecific interaction in which two species favour the growth and survival of each other.
(b) Pheromone : A chemical substance produced and released into the environment by an animal and affecting the behaviour of other of its species.
(c) Epiphytes: The plants which grow on other plants and use the host plants and use the host plant only as support but not for water or food supply.