Answer:
Cancer is caused by accumulated damage to genes. Such changes may be due to chance or to exposure to a cancer causing substance. The substances that cause cancer are called carcinogens. Occupational risk factors, including carcinogens such as many chemicals, radioactive materials and asbestos.
Explanation:
:)
A.
The human brain is estimated to have billions of these connections, according to some researches, about 100 billion.
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I know of a surety that A, B, and D all apply to Acids and must be false and completely opposite for Bases. That leaves me with the answer C. I don't remember learning about this in particular during Biology but I do believe that if any one was correct it would be that one. <u><em>My final answer is C.</em></u>
I believe lactic acid fermentation is used for all three!
Im like 98% sure its B because ultra sounds hear the frequency's of the baby in the womb