Chlorophyll is the primary pigment in plant chloroplasts. it absorbs all wavelengths of light, except
a. green
b. red
c. yellow
d. all of the above

Abird flies by moving its wings up and down. which two systems are most directly responsible for the movement of a bird's wings? a. skeletal and muscular systems b. respiratory and muscular systems c. skeletal and digestive systems d. respiratory and digestive systems