The frond is attached to a horizontal part of the fern known as the rhizome. Note where the frond is (or was) attached to the rhizome. The presence of leaves on a rhizome means that the latter is actually.

If scientists are wrong about earth's age based on radioactive material and the decay rates are really much faster, how would nuclear power plants be affected?

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

What are 3 reasons that natural selection occurs