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(a) With the help of a flow diagram, des...

(a) With the help of a flow diagram, describe how energy from th sun flows through various levels.
(b) Explain why, the flow of energy in the ecosystem is said to be unidirectional.

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LAKHMIR SINGH & MANJIT KAUR-OUR ENVIRONMENT-Exercise
  1. EFFECTS OF OZONE DEPLETION

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  2. What would happen if the ozone layer in the atmosphere completely disa...

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  3. (a) With the help of a flow diagram, describe how energy from th sun f...

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  4. (a) What is ozone ? How is it formed ? (b) How does ozone layer prot...

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  5. (a) How is energy introduced into the ecosystem ? (b) Consider the ...

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  6. (a) Explain why, a food chain usually cannot have more than three of f...

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  7. What provides the energy which then flows through a food chain ?

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  8. Which pollutant released into the air during refrigeration and aircond...

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  9. In the given food chain, suppose the amount of energy at fourth trophi...

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  10. Which of the following limits the number of trophic levels in a food c...

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  11. What percentage of sun's energy falling on the leaves of green plants ...

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  12. The depletion of ozone layer in the upper atmosphere is mainly due to ...

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  13. In an ecosystem, the 10% of energy available for transfer from one tro...

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  14. Flow of energy in an ecosystem is always

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  15. Excessive exposure of human to UV-rays results in (i) damage to imm...

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  16. Which of the following gets the minimum energy through the food chain ...

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  17. A food chain comprises of cat, seed-eating bird, plants, and dog. The ...

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  18. An aquatic food chain comprises of the organisms like tadpoles, weeds,...

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  19. Most of the water surface of a lake is covered with algae. This algae ...

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  20. If the energy available at the producer level in a food chain is 150 J...

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