One of the oldest arguments in the history of psychology is the Nature vs Nurture debate. Each of these sides have good points that it's really hard to decide whether a person's development is predisposed in his DNA, or a majority of it is influenced by this life experiences and his environment.
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alcohol is the answer i think
The group there in is Tertiary Consumer.☺
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They have long productive lives, cows will produce 10 or more calves calving regularly. The cows show great efficiency and often wean calves that weigh 45-50% of their body mass