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Tulika pia
Tulika pia
@tulika-pia
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Joined: Nov 6, 2020
Last seen: Dec 24, 2020
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Topics: 2124 / Replies: 0
AllTopicsReplies
Topic
Food chains generally consist of three or four organisms. (True/False)
5 years ago
Forum
Our Environment
Replies: 0
Views: 147
Topic
Factors such as light, temperature, pressure and humidity are considered as biotic components. (True/False)
5 years ago
Forum
Our Environment
Replies: 0
Views: 115
Topic
Ozone layer presents harmful infrared radiation. (True/False)
5 years ago
Forum
Our Environment
Replies: 0
Views: 182
Topic
Decomposers get their energy directly from autotrophs. (True/False)
5 years ago
Forum
Our Environment
Replies: 0
Views: 214
Topic
Flow of energy in an ecosystem is always ___________ .
5 years ago
Forum
Our Environment
Replies: 0
Views: 86
Topic
Organisms which synthesise carbohydrates from inorganic compounds using radiant energy are called ___________ .
5 years ago
Forum
Our Environment
Replies: 0
Views: 104
Topic
Depletion of ozone is mainly due to ___________ .
5 years ago
Forum
Our Environment
Replies: 0
Views: 94
Topic
Accumulation of non-biodegradable pesticides in the food chain in increasing amount at each higher trophic level is known as ___________ .
5 years ago
Forum
Our Environment
Replies: 0
Views: 104
Topic
Animal dung is ___________ waste.
5 years ago
Forum
Our Environment
Replies: 0
Views: 121
Topic
Burning of waste substances usually at high temperature of over 1000° C to convert them into ashes is called ___________ .
5 years ago
Forum
Our Environment
Replies: 0
Views: 249
Topic
Ultraviolet radiation from sunlight causes a reaction which produces ___________ .
5 years ago
Forum
Our Environment
Replies: 0
Views: 107
Topic
In an ecosystem, various organisms are linked forming interconnections such a condition is termed as ___________ .
5 years ago
Forum
Our Environment
Replies: 0
Views: 174
Topic
A food chain comprises of frog, snake, grass and grasshopper. The organisms at third trophic level is ___________ .
5 years ago
Forum
Our Environment
Replies: 0
Views: 196
Topic
Assertion: Biodegradable waste and non-biodegradable waste should be discarded separately. Reason: Biodegradable waste are not harmful.
5 years ago
Forum
Our Environment
Replies: 0
Views: 695
Topic
Assertion: Autotrophs can produce food on their own. Reason: Green plants can absorb 1% energy of sunlight that falls on the leaves.
5 years ago
Forum
Our Environment
Replies: 0
Views: 3786
Topic
Assertion: Ozone layer is getting depleted at upper atmosphere which is a cause of concern. Reason: CFC reacts with ozone and breaks it.
5 years ago
Forum
Our Environment
Replies: 0
Views: 413
Topic
Assertion: Accumulation of harmful chemicals is maximum in case of organisms at higher trophic level. Reason: Food chain normally do not go beyond 3 or 4 trophic levels.
5 years ago
Forum
Our Environment
Replies: 0
Views: 590
Topic
Assertion: Vegetarian food habit is more beneficial to organisms. Reason: Only 10% energy is available as food from one trophic level to next.
5 years ago
Forum
Our Environment
Replies: 0
Views: 1166
Topic
Which of the two in the following sets belong to the same trophic level? (a) Grass; Grasshopper (b) Goat; Spider (c) Hawk ; Rat (d) Frog ; Lizard
5 years ago
Forum
Our Environment
Replies: 0
Views: 215
Topic
What will happen if all the deer are killed in the given food chain? Grass → Deer → Lion
5 years ago
Forum
Our Environment
Replies: 0
Views: 221
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