Natural Selection Crossword Puzzle

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Across
  1. 5. Any natural or artificial process that results in differential reproduction among the members of a population
  2. 7. The act or process of becoming extinct/a coming to an end or dying out
  3. 8. An organism that lives on or in an organism of another species, known as the host, from the body of which it obtains nutriment
  4. 10. The frequency of occurrence or the natural geographic range or place where any item or category of items occurs
  5. 12. A different form of something; variant
  6. 13. A class of individuals having some common characteristics or qualities; distinct sort or kind
Down
  1. 1. Environmental conditions of a place
  2. 2. An animal hunted or seized for food, especially by a carnivorous animal
  3. 3. Used or understood by all/general
  4. 4. A very large quantity of something
  5. 6. A single step in natural descent, as of human beings, animals, or plants
  6. 8. A descendant or the descendants of a person, animal, or plant; offspring
  7. 9. A particular or indefinite amount of anything
  8. 11. A system or organization consisting of interdependent parts, compared to a living being