A previously neutral stimulus that is able to elicit a response similar to the unconditioned response as a result of being paired with an unconditioned stimulus is called a ____________ stimulus

Belinda plans to study early childhood development. Her decision was based upon her love of baby-sitting when she was in high school and looking after her young niece

the weekends. Her brother Brad disliked baby-sitting and tried to "gea. is naturally a more nurturing person than Brad. b. has developed skills and is thus more interested in child care than Brad. c. is considerably older than Brad. d. has more career options, but is still more interested in childcare than Brad. t out of it" when it was his turn. Most likely, Belinda

Which of the following statements best describes the effects of natural selection?

Species are eliminated, or "selected," one-by-one over thousands of years, and no new species are developed. || New species are naturally developed only every 2,000 years, and all previously existing species die out. || Species change over short periods of time, in spurts, and this change occurs roughly every 1,000 years. || Species change little by little with each generation, and over a long period of time they can develop into new species. || || ||