Why are sepals and petals referred to as "accessory parts" (of the plant)?

What controls activities within a eukaryotic cell?

Give an example of a trait that is controlled by more than one gene.

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