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प्रश्न
Which of the following are always at the second tropic level of food chains?
उत्तर
Primary consumers (green plants) are always at the second trophic level.
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संबंधित प्रश्न
Which of the following belong to the same trophic level?
Goat ; Spider ; Plants ; Hawk ; Rat
Which of the following belong to the same trophic level?
Tree ; Frog ; Snake ; Grass ; Lizard
Explain the terms 'producer' and 'consumer'. Give two examples of producers and two of consumers.
What is meant by a primary consumer, secondary consumer and a tertiary consumer? Give one example of each.
Write a common food chain of a pond ecosystem having four links.
One of the following is not a consumer. This one is :
(a) giraffe
(b) antelope
(c) algae
(d) alligator
The sea water contains water beetles, tadpole, fish and weeds.
Which organisms are (i) predators, and (ii) prey?
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
Explain why, a food chain usually cannot have more than three or four steps.
The surface of water in a lake appears green due to a layer of tiny free-floating organisms X on its surface. The lake water also contains organisms like water beetle, fish and tadpole. The sun shines over the lake water and provides energy for the functioning of this lake ecosystem.
(a) What could organisms X be?
(b) Write a food chain comprising of all the four organisms mentioned.
(c) What is the general name of the food chains like the one written above?
(d) Name (i) secondary consumer (ii) producer (iii) tertiary consumer, and (iv) primary consumer, in the above food chain.
(e) If the tertiary consumer gets 0.2 J of energy from the secondary consumer, then how much energy was radiated by the sun to the producer?
