Some scientists propose that before modern cells arose , rna dominated the world. which statement below , if true, would provide evidence for this hypothesis?

Most scientific questions are based on opinions. hypotheses. observations. experimental data.

Which of the following best describes the purpose of technology?

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.