I don't know if I am incorrect or if I am right, and if I am wrong please help me also I don't know if this is biology if it is not please let me know what it is

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? )

2. sketch the inside of the bean nodule, and describe or label what you observed with the hand lens.

When listening the levels of orginization in orginisims from the smallest to most complex , which level is just below organs in complexity