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The population is increasing exponentially. each year there are 2.5% more people than the last.
Answer:
Since all cells in our body contain DNA, there are lots of places for mutation to occur; however, some mutations cannot be passed on to the offspring and do not matter for evolution.
Explanation:
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Those are the answers on edge. I just did them.
Mechanical digestions is usually associated with the mouth. You mechanically chew the food and saliva breaks it down. Chemical digestion occurs in the stomach where stomach acid breaks it down.
The function of the hepatic portal circulation is to collect absorbed nutrients for metabolic processing or storage.