The neuroglia that produce myelin sheaths around axons in the peripheral nervous system are

How can you approximate the number of calories required to keep you in energy balance?

One gene can influence trait(s). one trait can be determined by gene(s).

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.