How do enzymes weaken the bonds in substances?

Why should the united state be concerned about air pollution in china?

Which of the following describes a difference when gram-positive bacteria are compared to gram-negative bacteria?

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