Which statement best explains the importance of nerve cells. nerve cells are used to send messages from different parts of the body to the brain. nerve cells are important in order for growth of an organism. nerve cells are necessary in order to keep your heart beating. nerve cells are used in the digestive system only.

Facilitates growth and change in neurons and the migration of neurons to different sites in the brain

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.

Fill in the blank with the correct sphere label. a: ⇒ geosphere b: ⇒ biosphere c: ⇒ hydrosphere