why no long chain food chains are available?
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Food chains always start with producers, which are almost always green plants. The other organisms in the food chain are consumers – they all get their energy and biomass by consuming (eating) other organisms. ... This also explains why there are few organisms at the top of food chains, compared with those lower down.
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these days no long food chains are available because a human intervention in the food chain that breaks the food chain and it is difficult for the animals to survive also due to the use of fertilizers and pesticides and many such chemicals that deposit in the higher trophic levels the animals with the help of a levels are not able to survive much
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