Which type of explanation might describe the presence of a behavior in a particular species by showing how that behavior increased the reproductive success of the species?

Neurons typically have ______

a. one axon and one dendrite b. one axon and many dendrites c. many axons and one dendrite d. many axons and many dendrites

Your 82-year-old grandmother was diagnosed with Alzheimer's disease four years ago. Your mother is very concerned about the potential of being diagnosed with Alzheimer's disease herself

She has been an avid runner for many years and vigorously exercises at least five times a week for 20 to 30 minutes a day. What would you tell your mother? a. Exercise surely will help, but there is no evidence that it does. b. Do not worry too much, exercise has been shown to decrease the likelihood of Alzheimer's disease. c. For any benefit to accrue from exercise, she will also need to closely monitor her diet. d. Very strenuous exercise actually increases the likelihood of experiencing Alzheimer's disease.