Which organism in most related to the rodents and rabbits on this cladogram

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? )

The basic types of tissue in the human body are

Which of the following cell structures is significantly different between gram- positive and gram-negative bacteria?