Summarize what happens to the chromosomes during each stage of mitosis and meiosis (Use terms homologous chromosomes, sister chromatids, spindle fibers, and tetrads in your description.) ​

Look at the picture below . what does this picture represent ?

The normal shape of an enzyme is as shown in structure a. if the enzyme’s shape changes to that shown in structure b, what are two consequences of this change?

In many humans, exposing the skin to sunlight over prolonged periods of time results in the production of more pigment by the skin cells (tanning). this change in skin color provides evidence that -