There is evidence that depressed children and adults underutilize the neurotransmitter

A researcher is measuring the length of time different couples were engaged before getting married and their reported levels of happiness with their marriage. In order to determine whether these two variables are related, which type of study will the researcher design?

a. An experimental study b. A correlational study c. A naturalistic observation d. A case study e. Clinical observation

Which of the following would you expect of a species that is active during the night and sleeps during the day?

a. It would have more rods and fewer cones in its retinas than a daytime organism. b. Their fovea would be larger than a species that is active during the day. c. This species would have poor vision in the dark. d. It would have more cones and fewer rods in its retina than a daytime organism.