science

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Across
  1. 2. selection is the process by which the distribution of traits in a population changes over many generations
  2. 6. species a more recent species that evolved from an ancestor population
  3. 9. to receive genes from a parent
  4. 12. living things, such as plants, animals, and bacteria
  5. 13. evidence of life from the past, such as ossilamissile bones, footprints, or leaf prints
  6. 14. an organism's arm, leg, or wing
Down
  1. 1. having died out completely and no longer alive anywhere on Earth
  2. 3. a related organism from a previous generation
  3. 4. sharing a common ancestor population
  4. 5. is trait a specific characteristic of an individual organism group of individuals born and living at about the same time
  5. 7. process by which species adapt to environmental changes over a very long time
  6. 8. to classify based on scientific examination
  7. 10. a graph that uses bars to show how characteristics or values are distributed within a group
  8. 11. ancestor popular is an older population from which two or more newer species descended