Birds differ from earlier vertebrates by

Birds differ from earlier vertebrates by
  a. their lack of scales.
  b. producing land eggs.
  c. the ability to maintain a relatively constant
  body temperature.
  d. the ability to fertilize eggs internally.
  e. their possession of a dorsal nerve cord.

Question 2

Which of the following statements is false?
  a. Lizards are a very small component of the
  present-day reptiles.
  b. Lizards gave rise to the snakes.
  c. Some lizards are not predators.
  d. Lizards have over lapping scales on their
  bodies.
  e. All lizards are roughly the same size