What happens during photosynthesis?

a. heterotrophs consume atp
b. heterotrophs produce atp
c. autotrophs consume carbohydrates
d. autotrophs produce carbohydrates

The circles, or orbits, for electrons are called energy levels. each level can hold only a certain number of electrons. add electrons to each level until you can't add any more. how many electrons can each level hold?

Sea stars, sea urchins, sand dollars, and brittle stars are all memeber of a group, what is the common name of the group they are all in

Wich level of organization includes all the other levels or organizations