12. Flowers whose reproductive structures consist only of stamens would be able to produce
A) fruits with seeds
B) fruits without seeds
C) pollen
D) ovules

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.

Which of the following molecules could pass through the plasma membrane by simple diffusion? a. na+ ions b. glucose c. amino acids d. carbon dioxide

Explain how the concentration gradient affects the process of atp synthesis