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Write a short note on pyramid of number ...

Write a short note on pyramid of number for any food chain. What can we conclude from this pyramid of numbers?
(i) tree
(ii) insect
(iii) woodpecker

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(1) The number of organisms in a food chain can be represented graphically in a pyramid of number.
(2) Each bar represents the number of individuals at each tropic level in a food chain.
(3) At each link in a food chain, from the first-order consumers to the large cornivores, there is normally an increase in size, but decrease in number.
(4). For example in a wood, the aphids are very small and occur in large numbers.
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VGS PUBLICATION-BRILLIANT-OUR ENVIRONMENT-OUR CONCERN-PREPARATION QUESTIONS FOR THE EXAMINATION PURPOSE
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  3. Give one example for primarry consumer in a grassland ecosystem.

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  4. What does the pyramid of number represent?

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  5. Who introduced 'Ecological pyramids'?

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  6. What does the pyramid of biomass represent?

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  7. What does a pyramid of energy represent?

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  8. Expand D.D.T.

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  9. Expand B.H.C.

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  10. Give an example for chemical pesticides.

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  11. Give one example for "perrfect pesticide".

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  12. What do you call the tendency of pollutants to concentrate as they mor...

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  13. name 'the process of entering of pollutants in a food chain'.

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  14. What do you call the substance meant for preventing, destroying or mit...

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  15. The functional role of an of organism in a community is called as?

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  16. The elaborate interconnected feeding relationships in an ecosystem is ...

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  17. Name the pathway along which food is transferred from tropic level to ...

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  18. What occupies the base of any ecological pyramid?

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  19. Any food chain in an ecosystem starts from?

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  20. What is the source of energy for all ecosystems?

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  21. Guess the reason for the growth of mosquito population.

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