A species of eels that lives in the ocean can move up rivers to spawn. A freshwater pike is unable to move into the ocean from a river. Based on your knowledge of cellular membranes, explain why eels can move back and forth into the ocean, whereas pike cannot. (4 points

The many stone tools, fragmentary animal bones, and teeth found at gran dolina, spain, indicate that hominids there? a. processed and consumed animals and other hominids. b. did not differ appreciably from earlier asian homo erectus. c. were similar to later homo sapiens. d. none of the above

The process of meiosis produces only gametes, eggs or sperm. according to the diagram, how many sperm are formed from each cell that undergoes meiosis?

While washing her hair olivia noticed that she was losing a lot of hair she visited a clinic and the physician reassured her that her hair would grow back how do you think olivias hair will grow back