Think about Keystone Species" and Trophic Cascades. What do I mean when I say that "some
animals are more equal than others"? Explain your
thinking.

The cluster of developing cells from conception until birth is called an

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

All ova contain sex chromosomes corresponding to: x y xx xy