What are the cytoplasmic extensions of an osteocyte called?

Aneuron is stimulated with an electric pulse. the action potential is detected at a point 3.70 cm down the axon 0.0052 s later. when the action potential is detected 7.20 cm from the point of stimulation, the time required is 0.0063 s. what is the speed of the electric pulse along the axon? (why are two measurements needed instead of only one? )

According to the cladogram, which organisms have roundworms as a common ancestor?

How are mutations continually being generated in a population (what are some of the causes of mutatuions? ) explain