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Consider the following statements conerning food chains (i) Removal of 80% tigers from an area resulted in greatly increased growth of vegetation (ii) Removal of most of the carnivores resulted in an increased population of deers (iii) The length of food chains is generally limited to 3 - 4 trophic levels due to energy loss (iv) The length of food chains may vary from 2 to 8 trophic levels Which two of the above statements are correct?A. I and IIB. II and IIIC. III and IVD. I and IV |
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Answer» Correct Answer - A Statements II are III are correct. A simple food chain consits of producers, herbivores and carnivores. The length of food chain is generally limited to 3-4 trophic levels due to the energy loss. In grazing food chain the producers (i.e. plants) are eaten by herbivores (i.e rabbit, deer, cow, etc) and theherbivores are eaten by carnivores therfore, the removal of most of the carnivores. resulted in an increased population of deers. |
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