Natural selection results in changes in ____.

Natural selection results in changes in ____.
  a. individuals
  b. populations
  c. kingdoms
  d. phyla
  e. animals only

Question 2

Which statement does not represent one of Darwin's observations?
  a. All individuals have an equal chance to survive and reproduce.
  b. Changes in populations are gradual and take place over long periods of time.
  c. Members of the same species may exhibit considerable variation.
  d. Some characteristics are heritable and passed on to offspring.
  e. Some characteristics afford their possessor a better chance of survival.