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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 ?

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

Which of the following limits the numbers of trophic levels in a food chain ?

Multiple choice question

Which of the following limits the numbers of trophic levels
in a food chain ?

Which of the statement is incorrect ?

Multiple choice question

Which of the statement is incorrect ?

Which group of organisms are not constituents of a food chain ?

Multiple choice question

Which group of organisms are not constituents of a food
chain ?

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