EASY
10th CBSE
IMPORTANT
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Accumulation of non-biodegradable pesticides in the food chain in increasing amount at each higher trophic level is known as

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Important Questions on Our Environment

EASY
10th CBSE
IMPORTANT
Eduwiser's CBSE BIOLOGY For Class X>Chapter 5 - Our Environment>EXERCISE>Q 6
Depletion of ozone is mainly due to
EASY
10th CBSE
IMPORTANT
Eduwiser's CBSE BIOLOGY For Class X>Chapter 5 - Our Environment>EXERCISE>Q 7
Organisms which synthesis carbohydrates from inorganic compounds using radiant energy are called
MEDIUM
10th CBSE
IMPORTANT
Eduwiser's CBSE BIOLOGY For Class X>Chapter 5 - Our Environment>EXERCISE>Q 8
In an ecosystem, the 10% of energy available for transfer from one trophic level to the next is in the form of
EASY
10th CBSE
IMPORTANT
Eduwiser's CBSE BIOLOGY For Class X>Chapter 5 - Our Environment>EXERCISE>Q 9
_____ represents feeding relationships within a community.
EASY
10th CBSE
IMPORTANT
Eduwiser's CBSE BIOLOGY For Class X>Chapter 5 - Our Environment>EXERCISE>Q 10
Flow of energy in an ecosystem is always
MEDIUM
10th CBSE
IMPORTANT
Eduwiser's CBSE BIOLOGY For Class X>Chapter 5 - Our Environment>EXERCISE>Q 11
Excessive exposure of humans to UV-rays results in
(i) Damage to immune system
(ii) Damage to lungs
(iii) Skin cancer
(iv) Peptic ulcers
MEDIUM
10th CBSE
IMPORTANT
Eduwiser's CBSE BIOLOGY For Class X>Chapter 5 - Our Environment>EXERCISE>Q 12
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
MEDIUM
10th CBSE
IMPORTANT
Eduwiser's CBSE BIOLOGY For Class X>Chapter 5 - Our Environment>EXERCISE>Q 13
Which of the following limits the number of trophic levels in a food chain?