The circulatory system and respiratory system are protected by your skin, muscles, and ribs.
The answer is "c. Some alleles are dominant and other are recessive"
Nonrenewable sources deal with fossil fuels (coal, petroleum, etc) so renewable would be the sun, water, wind, things that can be replaced
<span>adenine (A), cytosine (C), guanine (G) and thymine (T)
I think
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