Blank determines the sex of an individual

Which of the following represents a negatively charged ion? of t 7

Are the earth's ocean floor and continents the same age geologically? why or why not?

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.