The strands of dna molecule run in the opposite directions? true false

What kind of action is a cause of air pollution

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.

Categorize each term as something that is typical of a scientific theory, a scientific hypothesis, or both. makes predictions