NEET 2008 Biology question
Consider the following statements concerning food chains (a) Removal of 80% tigers from an area resulted in greatly increased growth of vegetation (b) Removal of most of the carnivores resulted in an increased population of deers (c) The length of food chains is generally limited to 3-4 trophic levels due to energy loss (d) The length of food chains may vary from 2 to 8 trophic levels. Which two of the above statements are correct?
Solution
(b) is correct: removal of predators (carnivores) lets the herbivore (deer) population increase. (c) is correct: because only about 10% of the energy passes to the next trophic level, food chains are generally limited to 3-4
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