What is an important characteristic of the plant cell wall?
a. it is fluid.
b. it is rigid.
c. it is alive.
d. it stretches. user: what is the function of the cholesterol molecules in a cell membrane?
a. they make it thicker.
b. they make it porous.
c. they make it more fluid.
d. they make it less flexible.

In german cockroaches, curved wing (cv) is recessive to normal wing (cv+). bill, who is raising cockroaches in his dorm room, finds that the frequency of the gene for curved wings in his cockroach population is 0.6. in his friend joe’s apartment, the frequency of the gene for curved wings is 0.2. one day joe visits bill in his dorm room, and several cockroaches jump out of joe’s hair and join the population in bill’s room. bill estimates that, now, 10% of the cockroaches in his dorm room are individual roaches that jumped out of joe’s hair. what is the new frequency of curved wings among cockroaches in bill’s room? 0.69 0.4 0.5 0.31 0.20

This is the amino acid cysteine. circle the amine group, put a box aroundthe carboxylic acid group and use a different colored pencil/pen to circle the sidechain (r group). h o | ||nh2— c- c-oh | ch2 | sh

The negative change found inside the plasma membrane is created by potassium ions sodium ions hydrogen ions chlorine ions