<span>Vitamin D is the only vitamin the body can produce naturally.
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We need them so we can clean out our urinary system. when you go to the bathroom. <span />
Answer:
Fraternal - 2 egg cells
Identical - split of zygote
Explanation:
Fraternal twins are likely to be formed by 2 different egg cells being simultaneously sent by the ovaries and both of them being fertilized by the sperm cells. They are non-identical because the DNA of the 2 egg cells and the 2 sperm cells are different.
Identical twins are formed after a single egg cell has been fertilized by a single sperm cell, then split after the first division. This results in 2 genetically identical embryos because they were formed from the same fertilized egg.
The answer I believe is c.secondary
Metabolic reactions are chemical reactions that occur within the body to release usable energy. Making the proteins, generation of energy and di<span>sposal of waste are all chemical processes that in total are referred to as your metabolism.
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<span>During this chemical process the fuel in the food
we eat is converted into the energy needed to power everything we do.The chemical reaction is controlled by specific proteins in the body.</span>
