Are plants actually producers of energy?
Uploaded bysunil View Answer
What is biological magnification and give its causes?
Give the correct sequence of various trophic levels in a food chain.
What are decomposers and what is the importance of them in the ecosystem?
Why energy of herbivores never come back to the autotrophs?
Which of the following will have the maximum concentration of harmful
chemicals in its body?
Peacock, Frog, Grass, Snake, Grasshopper
Why food chains consists of three or four steps only?
Write the harmful effect of ozone depletion.
If all the wastes we generate is bio-degradable what impact may this have on
the environment?
Name the process that is a direct outcome of excessive burning of fossil fuels?
Construct a food chain composing the following Snake, Hawk, Rats, Plants.
Which food chains are advantageous in terms of energy?
State one reason to justify the position of man at the apex of most food chains?
The number of malarial patients in a village increase tremendously, when a
large number of frogs were exported from the village. What could be the cause for it?
Explain the help of food chain?
What will happen to grasslands if all the grazers are removed from there?
What will happen if all the carnivores are removed from the earth?
What is the harm of clay cups?
What will happen if decomposers are not there in the environment?
What limits the number of trophic levels in a food chain.
Why some substances are degraded and others not?
Why is damage to the ozone layer a cause for concern? What steps are being taken to limit this damage?
Uploaded bysandeep View Answer
If all the waste we generate is biodegradable, will this have no impact on the environment?
What are the problems caused by the non-biodegradable wastes that we generate?
What is biological magnification? Will the levels of this magnification be different at different levels of the ecosystem?
Will the impact of removing all the organisms in a trophic level be different for different trophic levels? Can the organisms of any trophic level be removed without causing any damage to the ecosystem?
What will happen if we kill all the organisms in one trophic level?
Which of the following are environment-friendly practices?
(a) Carrying cloth-bags to put purchases in while shopping
(b) Switching off unnecessary lights and fans
(c) Walking to school instead of getting your mother to drop you on her scooter
(d) All of the above
Which of the following constitute a food-chain?
(a) Grass, wheat and mango
(b) Grass, goat and human
(c) Goat, cow and elephant
(d) Grass, fish and goat
How can you help in reducing the problem of waste disposal? Give any two methods.
Which of the following groups contain only biodegradable items?
(a) Grass, flowers and leather
(b) Grass, wood and plastic
(c) Fruit-peels, cake and lime-juice
(d) Cake, wood and grass
What is ozone and how does it affect any ecosystem?
What is the role of decomposers in the ecosystem?
What are trophic levels? Give an example of a food chain and state the different trophic levels in it.
Give any two ways in which non-biodegradable substances would affect the environment.
Give any two ways in which biodegradable substances would affect the environment.
Why are some substances biodegradable and some non-biodegradable?
sandeep View Answer