Which of the following statements is true with regard to this animation? sodium ions are transported down their concentration gradient. both sodium and potassium ions are transported against their concentration gradients. the cell is not expending energy. the cell does not expend atp. potassium ions are transported down their concentration gradient

Both sodium and potassium ions are transported against their concentration gradients

Explanation:

In the cell, the sodium potassium pump is a type of transport, of the active type.

It requires an energy expenditure and always goes against gradient.

For every 3 Na + that leave, 2 K + enter and the action hydrolyzes an ATP (ADP + P)

"a scientist studying a whale and its surroundings would need to understand the structure of atoms in case something was negatively affecting the whale or its surroundings."

explanation:

this was from the link provided:

the answer is b.) hydrogen bonds between bases.