Some plants need insects or birds to help them successfully reproduce. Why do they need these animals? How do they attract these animals? How do these animals help the plants reproduce? Use evidence from the article to support your answer. (This is an open-ended question.)

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