In cells, some molecules can move down their concentration gradients by crossing the phospholipid portion of the membrane directly, while others must pass through membrane proteins. Which of these statements applies to facilitated diffusion? I. requires the use of a membrane protein

II. used to move large/ or polar molecules

III. requires energy

I and II

III only

I only

I and III

Joe is breeding cockroaches in his dorm room. he finds that the average wing length in his population of cockroaches is 4 cm. he chooses the six cockroaches that have the largest wings; the average wing length among these selected cockroaches is 10 cm. joe interbreeds these selected cockroaches. from earlier studies, he knows that the narrow-sense heritability for wing length in his population of cockroaches is 0.6. a. calculate the selection differential and expected response to selection for wing length in these cockroaches. b. what should be the average wing length of the progeny of the selected cockroaches?

During the process of two rails or sides break apart and attract new nucleotide bases to form a new and complete strand.

How does the carbon cycle involve an exchange of carbon