Answer:
aorta
Explanation:
The aorta and its branches carries the blood to all the body's tissues.
In the mitochondria of the cell
Answer: A scientific question can be answered through an investigation. What is tested? Scientists call this an independent variable.
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Edit
Viruses reproduce within the living cells of the host and use the cellular machinery to synthesize their own genome and other components. To gain entry into cells, they have developed a variety of mechanisms to introduce their genes and proteins into host cells.
