The myelin sheath
a. nourishes the neurons
b. transmits impulses from one neuron to another
c. insulates the axons
d. insulates the synapses

What would happen to the nutrients in an ecosystem if decomposers, such as bacteria, didn’t exist there?

2. given that most biochemical (other than coal) rocks react with hydrochloric acid, what does that tell you about organisms?

Consider the skeleton. which skeletal system is represented by the shaded portion of the skeleton? spongy skeleton compact skeleton axial skeleton appendicular skeleton