Why the Calcium ions are flowing into the cell from the extracellular matrix (outside of the cell)

a adaptation is when organism changes itself to fit the environment

ex. when its cold outside i wear a jacket

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eukarya because is is like alche and b is bacteria and d is animals

explanation:

sex cells are usually half's then they find another half and make a fertilize egg

since there are no options posted i'll give you a few examples.

a dolphin's flipper, bird's wing, cat's leg.