Our Environment

Which of the following is biodegradable ?

Organisms which synthesise carbohydrates from inorganic
compounds using radiant energy are called

In an ecosystem, the 10 % of energy available for transfer
from one trophic level to the next is in the form of

Organisms of a higher trophic level which feed on several
types of organisms belonging to a lower trophic level
constitute the

Flow of energy in an ecosystem is always

Excessive exposure of humans to U V-rays results in
(i) damage to immune system
(ii) damage to lungs
(iii) skin cancer (iv) peptic ulcer