In the world of human-computer interaction, the keyboard or mouse that is used to alter the activity of a computer would be referred to as controls

When Pavlov placed food in the mouths of canine subjects, they began to salivate. The salivation was a(n)

a. unconditioned response. b. unconditioned stimulus. c. conditioned response. d. conditioned stimulus. e. discriminative stimulus.

What is the Hayflick limit for human embryo cells?

A) 10 B) 20 C) 40 D) 50