Which of the following statements characterizes an excitatory neuron? . -it sends an impulse back to the cell body of a neuron.

-it carry an impulse to the next neuron.

-it stops the passage of an impulse at a neuron.

At the beginning of the virtual lab, you were asked to sort eight lizards into categories. what criteria did you initially use to make your groups? did you revise your criteria later? why?

Asample of a population should be large enough to: a. justify the cost of the items needed for the simulation. o b. include more than half of the entire population. o c. span the full spectrum of a population's genetic variation, o d. generate a very large amount of data.

Many endangered species of birds in hawaii are in danger of contracting avian malaria from mosquito bites. many of these bird species live in the higher elevations of mountains in hawaii, where it is too cold for the mosquitoes to exist. if global warming continues at the current estimated pace, what would you expect to happen to the distribution of these bird species? a) their distribution will decrease to areas of even higher elevation. b) their distribution will increase because mosquitoes will die in the warmer regions. c) their distribution will remain the same, but their population size will decrease.