Biology 4.14 Crossword puzzles

12345678
Across
  1. 6. Prevents the fertilization of eggs.
  2. 7. The process by which individuals compete for access to mates and fertilization opportunities.
  3. 8. The idea that evolution occurs in spurts instead of following the slow, but steady path that Darwin suggested.
Down
  1. 1. Occurs after members of two different species have mated and produced a zygote.
  2. 2. Occurs when a species separates into two separate groups which are isolated from one another.
  3. 3. Evolution of an animal or plant group into a wide variety of types adapted to specialized modes of life.
  4. 4. Occurs when there are no physical barriers preventing any members of a species from mating with another, and all members are in close proximity to one another.
  5. 5. The policy of approaching a desired end by gradual stages.