The body shapes of porpoises and sharks are similar in appearance. yet recent ancestors to the porpoise were four-limbed terrestrial mammals. therefore, the streamlined shapes of these two animals are an example of

How will you manage your time to accomplish the necessary tasks both on the job and at home?

What is the main fuel source for the work of the cell

Ivan is looking at a cross section of a stem taken from a vascular plant. he sees two different types of vascular tissue: the xylem, which is closer to the center of the stem, and the phloem, located around the xylem, closer to the outside of the stem. how do these two structures work together in a living plant?