Mutation and recombination are the only processes that can increase genetic variation because they are also the only processes that:

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

Fungi are classified into how many groups? a. 1 group b. 2 groups c. 3 groups d. 4 groups

Several billion years ago which gas was the least prevailant in the atmosphere