Overproduction, variation, limits on population growth, and differential reproductive success are ...

Overproduction, variation, limits on population growth, and differential reproductive success are
  components of:
  a. evolution by natural selection.
  b. evolution by inheritance of acquired characteristics.
  c. punctuated equilibrium.
  d. genetic inheritance.
  e. gradualism

Question 2

Which of the following does not contribute to limits on population growth?
  a. snakes feeding on mice in a cornfield
  b. bears having two cubs
  c. the amount of light for photosynthesis
  d. a disease-causing organism entering a population
  e. an increase in the total rainfall in a normally dry environment