What percentage of the solar energy is trapped and utilised by the plants ?
What percentage of energy available at the producer level is transferred at successive trophic levels in a food chain ?
Name the process in which a harmful chemical enters the food chain and gets concentrated at each trophic level.
In a food chain consisting of grass, frog, bird and insects, where will the concentration of the harmful chemicals be maximum ?
If a harmful chemical enters a food chain comprising cat, mice and plants, which one of these organisms is likely to have the maximum concentration of the harmful chemical in its body ?
Which radiations are absorbed by ozone layer ?
Ultra Violet radiations.
Name the group of chemical compounds which damages the ozone layer.
Name two waste materials which can be recycled.
Paper and Plastics.
Name the process by which the volume of solid wastes can be reduced.
If 5 joules of energy is available at producer level (plants), then how much energy will be transferred to the lion in the following food chain ? If 5 joules of energy is available at producer level (plants), then how much energy will be transferred to the lion in the following food chain ?
Plants —> Goat —> Lion
State whether the following statement is true or false :
Only 10 per cent of the light energy given by the sun is available for transfer at each higher trophic level in a food chain.
Where does all the energy in living organisms originate from ?
Why are there rarely more than five links (or five organisms) in a food chain ?
Because after that the energy available for the next organism will be so small that it will be insufficient to sustain the life of that organism.
Name two predators of snakes in a food web operating in a forest ecosystem.
Peacock and hawk.
Fill in the following blanks with suitable words :Fill in the following blanks with suitable words :
(a) Ultraviolet rays can cause skin…………………
(b) Pesticides enter the food chain at the…………………. level
(c) Grass →…………….→Human
(d) Lettuce →…………….→ Fox
(e) Plants→ Antelope→ …………….