Sort the various processes so that each goes into the correct stage of the action potential variation in response to a stimulus: Positive potassium ions flow out of the cell
Sodium channels open
Potential inside the cell drops to slightly below resting potential
Potassium channels open
Potential inside the cell rises
Positive sodium ions flow into the cell
lons diffuse slowly until resting potential is reached
Depolarization
Repolarization
Resstablishing Resting Potential

d i think its   answer d

humans can cause extinction of a species through overharvesting, pollution, habitat destruction, introduction of invasive species (such as new predators and food competitors), overhunting, and other influences. explosive, unsustainable human population growth is an essential cause of the extinction crisis.

explanation:

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i think a) betsy can donate only blood to mark is correct because, mark and betsy have the same blood type. whereas nobody else has b+ blood so betsy can't donate to them.