A paramecium is a one-celled organism that uses its tail-like flagellum to move through the water. It also has an organelle called a contractile vacuole that helps it maintain water balance so that it won’t “explode”. What characteristic of life is this an example of? a. Energy b. Homeostasis c. Organization d. Cells

How many species of living things are alive on earth today? more than 1,000,000 none of these answers are correct 100-500 1,000 –500,000 o 500,000 -1,000,000

15 ! come and answer! a(n) disease is caused by a pathogen and can spread among organisms. a infectious b noninfectious c toxic d contaminated

Up until 1938, paleontologists accepted the idea that coelacanths (an ancient fish) went extinct at the time that they last appear in the fossil record, about 80 million years ago. but in 1938, a live coelacanth was discovered off the coast of south africa that was compared to the fossil record and found to be the same species what goal of science does this discovery represent