Which is not part of the cell theory? a. all cells come from existing cells. b. microscopic organisms are not made of cells. c. all living things are made of one or more cells. d. cells are the basic unit of structure and function in living things?

Which describes how weathering and erosion are different? weathering is caused by water. erosion is caused by wind and ice. erosion transports sediments. weathering is a natural process.

What are some characteristics of a free enterprise economy?

Why do leaves change color in the fall? green pigments break down and no longer mask the color of chlorophyll. chlorophyll breaks down and no longer masks the colors of other pigments. red- and yellow-colored pigments grow and mask green-colored chlorophyll. green-colored chlorophyll breaks down and turns red and yellow.