NEET Biology question
Consider the following statements concerning 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 deer. III. The length of food chains is generally limited to 3 to 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?
Solution
Removing carnivores (tigers) releases herbivores such as deer from predation pressure, so their population increases (statement II is correct), and because only about 10% of energy passes to each successive trophic level, food chains are generally restricted to 3-4
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