Cells are the basic unit of structure in all living things. ... Since cells are in all living things, they provide information about all life. Because all cells come from other cells, scientists can study cells to learn about growth, reproduction, and all other functions that living things perform
It would be Agility
Explanation: a number of factors can affect bone health like the amount of calcium in your diet
The have been 17 reversals in the span of 4 million years