Lecture 24

Question 1

Reciprocal Altruism

Answer 1

if the fitness benefit to the recipient > the fitness cost to the donor, both participants will benefit if it is reciprocated at a later date

Question 2

1st Increase in brain size

Answer 2

-corresponds to increased meat consumption, high quality food

Question 3

Natural Selection for larger brain size elements

Answer 3

1. Complex foraging: skillful and cooperative hunting
2. Cooperative breeding and complex social interactions
3. cooking with fire

Question 4

Constraints of Brain size increase

Answer 4

1. temperature sensitivity

2. metabolism, brain uses a lot of energy

Question 5

2nd Increase in brain size

Answer 5

-h sapiens have long development time and short inter birth time which can be explained by cooperative breeding