new diseases, new competitors, single catastropic events, organisms cannot adapt to their new enviroment, new predators, changes to the enviroment over million of years
1 of 5
enzymes work best at what ph?
2
2 of 5
give two differences between mitosis and meiosis?
mitosis produces 2 cells from a single divison of one cell, meiosis produces 4 cells from two divisions of a cell, mitosis produces genectically identical cell. meiosis produces cells that are not genectically identical
3 of 5
what are animal cell surrounded by?
cell membrane
4 of 5
what is the job of the nucleus?
controls all activites of the cell. contains the genes and chromosomes.they carry the instructions for making new cells or new organisms
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