Biological evolution is the process through which the characteristics of organisms change over successive generations, by means of genetic variation and natural selection. hope that helps
Turning amino acids into molecules that can be used in the Krebs cycle takes energy, which means that burning protein for fuel is not as efficient as burning carbohydrates. ... When amino acids are used as an energy source, it reduces the reserves of amino acids that are available for protein synthesis.
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Land use goes up as human population goes up. This is because the more people there are alive, the more land that people will be using. Hope this helps :)
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the fine transparent tubular sheath which envelops the fibres of skeletal muscles.
