Alexis uses cocaine, which activates her sympathetic nervous system. expecting her dealer, she finds her hands shaking and her heart pounding when she hears a knock on the door. in this scenario, which of the following options correctly identifies the neutral stimulus, the conditioned stimulus (cs), and the unconditioned stimulus (ucs)?

it would lead to upper respiratory infections and pneumonia.

thinking it would be physical characteristics

the answer is true when observing or determining population size, a direct observation is use, in which each organism is counted in a population or in an area. one benefit of this measure is that you get the exact population count but it will take a long time to  determine  the  size  of a  population.