Gender that only cares for offspring if they can't find other mates and if their help would increase the offspring's fitness.

Your roommate will vacuum the dorm if you do the dishes, a _________ relationship. You help your roommate study with flashcards for her midterm, even though she's too busy to help you study, a ______________ relationship.

Define continental drift. Extra: name the early continents.

The process that creates adaptations that allow males to compete more effectively with other males for females.

You prefer to help your brother over a school friend when he gets into financial trouble (________). If he helps you when you are in trouble, then that is ________________.

_____ use their tails for balance and walking and they sit as they feed; ______ feed while suspending themselves from their arm and move under branches while upright.

Traits that arise that help a male drive competitors away from females (eg, large body size, large teeth).

Evaluating kinship relationships based on smell or appearance to yourself.

The oldest known hominid.

Female choice of a mate based off of the male's attractive characteristics (eg, plumage)

Name three requirements of reciprocal altruism among nonkin

Features of bipedalism.

Dominance relationships and direct fights arising from a situation where there are clumped, valuable resources. (Extra: what is the opposite of this phenomenon?)

Social pressures (must be able to keep track of members) and ecological pressures (finding, remembering food) reward greater flexibility, leading to expansion of learning and planning parts of the brain.