If your 14 to 12 wanna do a zoom?

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.

The first amino acid of a new polypeptide chain is

What is the average speed of a car that traveled 300.0 miles in 5.5 hours