Answer:
Star formation occurs most rapidly in the spiral arms, where the density of interstellar matter is highest.
They are called stem cells. This cells are undifferentiated which means it can specialize in other types when it receives the right stimuli. They can divide through mitoses and become more stem cell or become a bone, muscle, blood cell, etc.
They can have 2 origins: embryos or some human tissue; their function is to regenerate or substitute damaged cells
A becuz its at da it dont got no wa
A pH scale goes from 0 - 14.
7 is in the middle so it is neutral
Divide (25,000) by (the number of miles you can walk in 1 hour).
The answer you get is the number of hours it would take you to walk around the Earth once, IF you were able to walk on water too.
