Why are phospholipids arranged in a bilayer in cell membranes?
Select one:
O a. The hydrophobic heads are attracted
to water and arrange themselves to be
immersed.
O b. They hydrophilic heads repel water
and arrange themselves to be inside the
membrane.
O c. The hydrophilic tails are attracted to
water and arrange themselves to be
immersed.
O d. They hydrophobic tails repel water
and arrange themselves to be inside the
membrane.

In this case, the statement that people who exercise for an hour may have lower cholesterol levels is .

8) animals respond in various ways to stimuli detected through their senses. some of these responses are stimulated by the presence of danger. which of these animal responses is the best example of a response to an immediate threat? a) a rooster crows every morning at the first sign of light. b) as something approaches an octopus, it shoots a cloud of ink. c) from late fall until spring, bears hibernate to preserve energy. d) a dog is getting hot in the sunlight, so he moves to a shaded area.

Astudent wants to test the hypothesis that fertilizer improves the growth rate of grass seeds. to test this hypothesis, the student put the same amount of grass seed in 3 containers with the same type of soil. the student measured the growth at the end of the week. all plants received equal amounts of water and sunlight. if you were asked to graph this data, what would you place on the x-axis? a. fertilizer b. water c. plant growth d. week one