According to scientific thought, when does one species of organisms become two species? Question 13 options: when populations become separated from one another when one population becomes extinct when populations compete for the same resources when one population cannot interbreed with the other population.

Using freezing point depression to find molecular weight lab report

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? )

Which event would lead to primary succession of a forest?