Wear safety goggles while looking into the opening of the test tube
Answer:
By the process of cellular differentiation which consists of physical and functional changes of the cell used by processes at the genetic level. The expression of these in each type of cell is different. That is to say that the type of cell follows at a time of development there is differential activation of some genes and repression of others
The first one is commensalism. The second one is mutualism. The last one is parasitism.
Answer:
Arteries carry blood away from the heart
Explanation:
Veins carry the blood back to the heart.
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