Animals have a great variety of internal structures that define the way they live. for example, a bear has lungs to it get oxygen to all of its cells. what does a fish have that serves the same function? a. scales b. gills c. fins d. lungs

Could someone me with number one you

The influenza virus cause the flu, but not other diseases. why?

Now it's your turn to investigate human impact around the world. grab your virtual lab coat and put on your environmental science hat. you will be taking a trip around the globe to explore three locations. at each location, you will investigate the cause and effect relationships of deforestation, desertification, and urbanization. you will also gather evidence of how these factors have impacted the environment over time