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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 ?

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

In the following groups of materials, which group (s) contains only non-biodegradable items ? (i) Wo...

Multiple choice question

In the following groups of materials, which group (s)
contains only non-biodegradable items ?
(i) Wood, paper, leather
(ii) Polythene, detergent, PVC
(iii) Plastic, detergent, grass
(iv) Plastic, bakelite, DDT

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