Fun and Cool Natural Selection

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Across
  1. 2. selective ______
  2. 5. the subject this is
  3. 7. when a thing changes for the better
  4. 9. a change an organism goes under to suit their environment
  5. 10. Darwin's _____
Down
  1. 1. a type of living thing
  2. 2. boat stuff I guess
  3. 3. _____ selection
  4. 4. to better suit their ______
  5. 6. Gregor Mendel is a cool ______
  6. 8. Charles _______