The difference<span> between the </span>birth rate<span> and the death </span>rate<span> of a country or place is called the </span>natural increase<span>. </span>
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Hello! Trophic hormone is a hormone that has a growth effect, hyperplasia or hypertrophy, on the tissue, it is stimulating.
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d
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mechinal energy is energy made from movement, since they go through turbines to make energy its mechincal
Because patches of thickened skin in the embryos created special cells known as columnar cells