Last seen: Sep 30, 2021
Food chains generally consist of three or four organisms. True
Factors such as light, temperature, pressure and humidity are considered as biotic components. False
Ozone layer presents harmful infrared radiation. False
Decomposers get their energy directly from autotrophs. False
Flow of energy in an ecosystem is always unidirectional.
Organisms which synthesise carbohydrates from inorganic compounds using radiant energy are called producers.
chlorofluorocarbon compounds
Accumulation of non-biodegradable pesticides in the food chain in increasing amount at each higher trophic level is known as biomagnification.
Animal dung is Biodegradable waste.
Burning of waste substances usually at high temperature of over 1000° C to convert them into ashes is called Incineration.
Ultraviolet radiation from sunlight causes a reaction which produces O3.
In an ecosystem, various organisms are linked forming interconnections such a condition is termed as Food web.
A food chain comprises of frog, snake, grass and grasshopper. The organisms at third trophic level is frog.
(c) Assertion is true but the Reason is false.
(b) The Assertion and the Reason are correct but the Reason is not the correct explanation of the Assertion.
(a) Both the Assertion and the Reason are correct and the Reason is the correct explanation of the Assertion.
(b) The Assertion and the Reason are correct but the Reason is not the correct explanation of the Assertion.
(a) Both the Assertion and the Reason are correct and the Reason is the correct explanation of the Assertion.
(d) The population of lions decreases and grass increases.