Answer: Animals use only respiration, while plants use both photosynthesis and respiration.
A, because it the constant variable
One cell produces two genetically identical daughter cells is both mitosis and meiosis.
B. How far do butterflies migrate
A, C and D are opinions not facts.
There are two main reasons why cells divide rather than continuing to grow larger and larger. One of the main reason is that the larger cell become more demanding, therefore the large cell will increase load on the machinery of the cell such as DNA. The other reason is that if the cell grow too large it will be difficult for the cell to move for nutrients and discard the waste across the cell membrane. Also the surface area for each cell will also be reduced, which is required for active functionality of a cell.
