What shows the one-way
movement of energy through an
ecosystem?
a. food chains
b. food pyramids
c. food webs

Astudent is looking through a microscope at some cells of an onion root tip. many of these cells are undergoing division since the root tip grows quickly and requires more cells. which cell most recently underwent metaphase? w x y z

How is the national wildlife refuge system similar to the pacific region coastal program? a. both programs are concerned with providing habitats for wildlife b. both programs are primarily concerned with preserving fish species c. both programs have set aside 150 million acres of land d. both programs are under the u.s. fish and wildlife service

Apaleontologist finds a plant fossil that shows that the plant had seeds. what can the paleontologist conclude?