Structural and functional units of the nervous system.

a. axon
b. myelin sheath
c. dendrites
d. glial cells
e. neuron

In which situations is the principle of cross-cutting relationship useful in determining relative age?

How are gross production and net production different? a. net production is always greater than gross production. b. net production is always less than gross production. only animals have net production. d. only plants have net production. select the best answer from the choices provided

Which of the following is a feature of all cells? o a. all cells have a nucleus. o b. all cells have dna for at least part of their life cycle. het . o c. all cells are spheres. o d. all cells have a rigid cell wall.