If an experimental design is well implemented, the experiment is probably the strongest design with respect to internal validity

Which of the following statements about neurons is TRUE?

A) Prior to birth, new neurons form very slowly. B) The cerebral cortex contains approximately 80 billion neurons. C) Neurons seldom die before the person's birth. D) Neurons are unable to migrate.

Regarding the way rods and cones operate, ________

a. both cones and rods tend to pool their signals on their way to bipolar cells b. rods, but not cones, tend to pool their signals on their way to bipolar cells c. cones, but not rods, tend to pool their signals on their way to bipolar cells d. neither rods nor cones pool their signals on the way to bipolar cells