(b) Biodegradable substances can be broken down into simpler harmless substances in nature by microorganisms whereas non-biodegradable substances cannot be broken down into simpler harmless substances in nature.
(b) Biodegradable substances can be broken down into simpler harmless substances in nature by microorganisms whereas non-biodegradable substances cannot be broken down into simpler harmless substances in nature.
Organisms which synthesise carbohydrates from inorganic compounds using radiant energy are called
(b) producers
(b) producers
See lessDepletion of ozone is mainly due to
(a) chlorofluorocarbon compounds
(a) chlorofluorocarbon compounds
See lessAccumulation of non-biodegradable pesticides in the food chain in increasing amount at each higher trophic level is known as
(c) biomagnification
(c) biomagnification
See lessAn ecosystem includes
(c) both living organisms and non-living objects
(c) both living organisms and non-living objects
See lessln a food chain, the third trophic level is always occupied by
(a) carnivores
(a) carnivores
See lessWhich one of the following is an artificial ecosystem?
(b) Crop field
(b) Crop field
See lessWhich of the following are environment-friendly practices?
(d) All the above
(d) All the above
See lessWhich of the following constitute a food-chain?
(b) Grass, goat and human
(b) Grass, goat and human
See lessThe difference between biodegradable and nonbiodegradable substances is
(b) Biodegradable substances can be broken down into simpler harmless substances in nature by microorganisms whereas non-biodegradable substances cannot be broken down into simpler harmless substances in nature.
(b) Biodegradable substances can be broken down into simpler harmless substances in nature by microorganisms whereas non-biodegradable substances cannot be broken down into simpler harmless substances in nature.
See lessOne of the best solutions to get rid of non-biodegradable wastes is……………….
(b) recycling
(b) recycling
See less