A student is experimenting with a substance that moves into the cell via facilitated diffusion. The student notes that as the concentration of the substance outside of the cell increases, the rate of movement of the substance into the cell increase and then plateaus. What explains the phenomenon seen by the student?

Use the drop down menus to match each example to the fossil topic discussed then to show how the fossil record gives evidence of evolution

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

Which label correctly identifies what x represents in the concept map?