both primary and secondary active transport require energy in the form of to drive substances across a cell membrane.

20 in the formula no3, what does the subscript 3 mean?

In what layer of the sun is energy transfers between atoms

Several bird species feed in a certain species of tree. each bird species feeds in a different part of the tree. which statement is true of these bird species? a. they have adapted to different niches due to competition b. they have a carnivorous relationship with the tree species. c. they have adapted to different niches due to predation d. they have a symbiotic relationship with the tree species.