Cells need both genes, and each cell inherits half of the genes from both cell parents.
Answer:
1st is correct
Explanation:
At its simplest, a dog's digestive system is a long tunnel that runs from their mouth to the anus. Food goes in at the mouth and travels through this tube and at various stages is broken down and either absorbed into the body or excreted as waste at the anus.
<span>Most of the nitrogen gas in Earth's atmosphere comes from _____.
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<span>
D. the breakdown of carbon dioxide</span>
It is a living because it moves it grow back parts
