Tim and Jim are identical twins who were raised apart. Ned and Ed are fraternal twins who were raised together. According to research cited in your textbook, which pair of twins will have more similar IQ scores, if either?

The controlled use of fire by hominids: (a) limited the expansion of hominids into certain environments, such as dry grasslands. (b) decreased the amount of food energy available in the hominid diet. (c) contributed to geographical expansion and food production techniques in positive ways. (d) has been shown to contribute little to the digestive process of hominids.

Which of the following is an example of how the principle of beneficence can be applied to a study employing human subjects? providing detailed information about the study and obtaining the subject's consent to participate. ensuring that the selection of subjects includes people from all segments of the population. ensuring that persons with diminished autonomy are protected. determining that the study has a maximization of benefits and a minimization of risks.

Samantha is looking for a boyfriend. based on the gender differences explained in this activity, which is she likely to prefer?