The sodium-potassium pump is involved in active transport that moves 3 sodium ions from the cell for every 2 potassium ions it moves
into the cell. Which of these best explains why energy is needed for
active transport?

lunar landing mission. apollo 11 was the first manned mission to land on the moon. the first steps by humans on another planetary body were taken by neil armstrong and buzz aldrin on july 20, 1969. the astronauts also returned to earth the first samples from another planetary body.

explanation:

that is true   : ) hope this you

energy and particles

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

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