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Who introduced 'Ecological pyramids'?...

Who introduced 'Ecological pyramids'?

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The concept of ecological pyramids was first introduced by a british ecologist charles elton in 1927.
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  2. What is a perfect pesticide?

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  3. Who introduced 'Ecological pyramids'?

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  4. How can we draw a food chain?

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  5. How many types of ecological pyramids are there in practice? Name them...

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  7. What limits the number of trophic levels in a fooc chiain?

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  8. State one reason to justify the position of man at the apex of most fo...

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  9. Which food chains are advantageous in terms of energy?

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  10. Construct a food chain composing the following : Snake, Hawk, Rats, Pl...

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  11. Which of the following will have the maximum concentration of harmful ...

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  12. Prepare two slogans to consere water.

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  14. Explain the flow chart given below.

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  15. Observe the pyramid of number which is given below and answer the ques...

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  17. GrasstoGrasshoppertoFromtoSnaketoHawk. What will happen if we remove...

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  18. Observe the diagram and answerr the following. (i) Wriite any two fo...

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  19. Write any 4 slogans on the necessity of forests and on their conservat...

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  20. How does the given below concepts differs? (a) Bioaccumulation (b)...

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