believed that classical conditioning occurred because the conditioned stimulus became a substitute for the unconditioned stimulus when paired closely together in time.

Which format should he use to present his data?

Atypical human cell is approximately 12.00 μm in diameter and enclosed by a membrane that is 5.000 nm thick. (a) what is the volume of the cell including the membrane? (b) what is the volume of the cell membrane? (c) what percent of the total volume does its membrane occupy? to simplify the calculations, model the cell as a sphere. enter your answers using four significant figures.

Ais a group of individuals of the same that exist together in the same place at the same time