Answer:
mitosis
Explanation:
Mitosis is when a cell divides.
The kidneys secrete an enzyme called renin
Answer:
nuclear fusion
Explanation:
When the density and temperature at the core of the gravitationally collapsing nebula reaches values when nuclear fusion is triggered and sustained, that marks the birth of the star.
Answer:
The frequency of the sound.Hope this helps btw
Explanation:
You would need to know how fast the sound waves go through the air.
it only need one to fertilize a egg in a flower
