Why is active transport necessary for the sodium-potassium pump to work?
a. the sodium would never leave a cell while potassium can move against the gradient
b. all channel movement requires active transport to equalize the cell
c. it allows sodium and potassium to move against their concentration gradient
d. the potassium would never leave a cell while sodium can move against the gradient

Consider the last statement in the prompt: "people take such environmental factors into account in their choices when deciding where to live." do all people have a choice as to where they live? what factor plays a key role in this decision and may therefore play a large role in determining quality of life?

Ry was studying two populations of the same species of lizards. one population lived on an island and the other lived on the mainland. both populations were affected by a hurricane that hit the island and the mainland with equal force. a year later, henry was testing the gene frequency and saw a decrease in genetic variation in the island species, but not in the mainland species. which best describes a conclusion he might have reached? gene flow greatly affects small populations, but large populations can recover. genetic drift greatly affects small populations, but large populations can recover. gene flow greatly affects large populations, but small populations can recover. genetic drift greatly affects large populations, but small populations can recover.

Aflame cell is at the end of each tubule of the nephridium malpighian tubules kidneys none of the above