Organisms use excretory systems to rid their body fluids of nitrogenous wastes. Name and describe the excretory organs/systems found in invertebrates and vertebrates, including an example of an organism that utilizes it.

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