Answer: the digestive and circulator
Answer:
When cancer cells begin new tumors far from the primary tumor, metastasis has occurred.
Planets because the gravitational field is strong enough to clear things out of its path<span />
Answer:
The answer is basically that having nerve cells reproduce can do more harm than good. Each nerve cell has a specific place in our nervous system. ... Adding new nerve cells would mess up these very specific connections in a very complex system.
Answer:
D. Tongue rolling
Explanation:
Not many people can do this