Natural Selection and Evolution

Edit Answers
1234567891011121314151617
Across
  1. 3. Organisms better adapted to their environment survive and reproduce. (2 words)
  2. 6. DNA is shared in related species, showing common __________.
  3. 8. Gradual change in a species over time.
  4. 10. Body parts that indicate common or similar ancestry are called _____________ structures.
  5. 11. A trait that helps a population/organism survive
  6. 14. Organisms fight over limited resources
  7. 15. Any change in DNA sequence.
  8. 16. Organisms that can mate with each other AND produce fertile offspring.
  9. 17. Known for his theory of evolution
Down
  1. 1. Genetic ____________ is the difference between individuals of the same species. It is only caused by Sexual Reproduction and Mutation.
  2. 2. A _____________ trait is a characteristic that an organism can pass on to its offspring through its genes.
  3. 4. Survival of the _________ says that Some traits are better for survival in a particular environment.
  4. 5. When the last of a species dies.
  5. 7. A group of organisms of the same species living in a particular area at the same time.
  6. 9. Organisms have more offspring than can survive.
  7. 12. Human breeding organisms for desired traits is called _________ selection.
  8. 13. _____________ show the change over time in a species.