Which statements best describe natural selection? Check all that apply.
Populations must have genetic variation
Genetic mutations do not produce advantageous traits
Natural selection occurs when the environment changes
Evolution works independently of natural selection
Organisms best suited for the environment survive and repro

Which units ate used to measure both velocity and speed? check all that apply

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

2. which is the last step in the scientific method?