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CBSE Notes 2011-2012 » X-Science-Term2

Our Environment

Which of the following is biodegradable ?

Multiple choice question

Which of the following is biodegradable ?

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

Multiple choice question

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 ...

Multiple choice question

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 tr...

Multiple choice question

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

Multiple choice question

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...

Multiple choice question

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

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