Science M.C.Q

In which category does the human beings fall in an ecosystem?

By whom the number of organisms are limited at trophic level of food chain?

Which of the following groups have only non-biodegradable components?
1. wood, paper, leather
2. polythene, detergent, PVC
3. plastic, detergent, glass
4. plastic, grass, animal dung

Which organism is more affected by biological magnification problem arising due to entry of DDT in pond ecosystem?

Which is the correct statement regarding food chain?

Usually green plants are at first level in an ecosystem because…

Statement X : Reduction in number of prey altimately results in reduction of the number of predator.
StatementY : Ozone layer absorbs harmful ultraviolet radiations.
Which option is correct for statements X and Y?

Statement X : Decomposers satisfy their energy requirement directly from producers.
Statement Y : The amount of available energy in an ecosystem depends on the rate of photosynthesis carried out by the producers.
Which option is correct for statements X and Y?

When frog uses grasshopper as food, then energy flow occurs from…

Which of the following are environment friendly practices?

Which of the following constitute a food chain?

What is the role of decomposers in an ecosystem?

Which of following is wrong statement?

Which trophic level, lowest energy available In an ecosystem?

Which trophic level has highest energy in an ecosystem?

An ecosystem has producers, herbivores and carnivores but without which of following it is not complete?

In the food chain comprising of a frog, snake, grass, grasshopper, which organisms is at third trophic level in it?

In food chain, organisms which synthesise carbohydrates by the conversion of radiant energy are called.....

What is formed by interdependent organisms to each other for their nutrition?

What is being form due to entry of harmful chemical in food chain?

Ecosystem is an interacting system made up of…

Which of the following is an example of non-biodegradable waste?

Which of the following is an example of biodegradable waste?

Which of the following statement is wrong in case of food chain?

In the agricultural farm with wheat crop, snake, peacock, kite, rat, etc. occur in food chain. Pesticides are spray regular time interval. Which of the following animal has lowest concentration of pesticides?

In an ecosystem third trophic level is always occupied by which animals?

Which of the following problem is a result of man-made activities?

A rat is in which category of consumer animals?

In an ecosystem…

Which of the following option is correct for decomposers feeding on dead organism?

Bacteria	Fungi	Virus
A. No	Yes	Yes
B. Yes	No	Yes
C. Yes	Yes	No
D. Yes	Yes	Yes

Which is possible food chain in pond?

Producer	Primary consumer	Secondary consumer
A. Algae	Fish	Larva of mosquito
B. Fish	Algae	Larva of mosquito
C. Larva or mosquito	Algae	Fish
D. Algae	Larva of mosquito	Fish

In a food chain deer feeds on plants. Deer is eaten by a lion. Which of the following statement is correct for it?
I. Lion is secondary consumer and deer is primary consumer.
II. Lion is predator and deer is prey.
III. Lion is primary consumer and deer is secondary consumer.
IV. Lion is tertiary consumer and deer is secondary consumer.

There are more herbivores than carnivores in a food chain because...
I. carnivores have bigger appetites.
II. a large number of herbivores are needed to support a small number of carnivores.
III. there are more plants for herbivores to eat.
IV. much energy is lost in the transfer of energy from herbivores to carnivores.

Animals that fed on both producer as well as consumer trophic level are called....

Which process is significant in a primary producers for to sustain an ecosystem?

Which of the following are environment-friendly practices?

Which of the following constitute a food chain?

Which of the following groups contain only biodegradable items?