The average heart beats about 100,000 times a day. true or false?

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? )

Look at the photo of the leaf. which term best describes this leaf?

Explain how the number of similarities between the embryos from early stage to late stage is used as evidence of a common ancestry