Which of these statements did you include in your answer? Check all that apply.

its b

explanation:

there is no change

he is very short, and he can only reach halfway up on the elevator buttons. but on a rainy day, he has his umbrella with him, and he uses it to poke the button at the top.

a unit of heredity that is transferred from a parent to offspring and is held to determine some characteristic of the offspring.

many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.