Why do the absorption spectrum for chlorophyll and the action spectrum for photosynthesis coincide?

What did the first language sound like

What type of genetic drift would be simulated if all the beans that were not selected died out?

Select the situation bellow that would produce a total displacement of zero. a. a trip to the moon and then to mars b. a horse galloping from one end of a field to another c. the criss-crossing path of a bug as it flies from flower to flower d.a round-trip ride to school and back