Sophie says dolphins and sharks look very similar, so they must be related. jake disagrees, saying dna evidence has shown that dolphins and other aquatic mammals are actually more closely related to the ancestors of modern hippos. who is correct using the modern system of classification?

Types of scientific inquiry that biologist engage in that cannot be completely controlled

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 of the following forest management practices is best for reestablishing areas of forest?