Answer:a
Explanation: because blood is pumped out of the heart and into the body to supply oxygen to working muscles or to the lungs for re-oxygenation
The answer is D. The presence of oncogenes
Oncogenes is a gene that has potential to cause Cancer. Once it appear on tumor cells, Oncogenes often mutated at a very high level. When the cells critical function altered, they usually undergo a rapid cell death. But once oncogenes activated, those malfunction cells will not undergo rapid cell death, filling our body with malfunctioning cells
I'd say 13-14 years of age... usually when kids are starting high school
Answer:
can you tell me the question so I can help
Explanation:
ill keep looking until you post
