group living

Question 1

costs of living in a group

Answer 1

1. Increased probability of detection by predators
2. Increased transmission of parasites/diseases
3. Increased chance of cuckoldry

Question 2

Benefits of group living

Answer 2

1. Homeothermic animals save energy (Ex. tiny Indiana bats
   hibernate in clusters,
   save energy)
2. Hydrodynamic and aerodynamic benefits
   (drafting’ behind
   leaders reduces
   resistance; requires
   less energy to
   swim/fly)
3. Problem solving

Question 3

definition of homeootherm

Answer 3

an organism that maintains its body temperature at a constant level

Question 4

definition of altruism

Answer 4

behavior of an animal that benefits another at its own expense.