Which of the following types of molecules are the major structural components of the cell membrane?
select one:
a. proteins and cellulose
b. phospholipids and proteins
c. glycoproteins and cholesterol
d. nucleic acids and proteins
e. phospholipids and cellulose

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