Evolution and Natural Selection Crossword

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Across
  1. 1. The factors in an ecosystem that make it hard to survive and reproduce
  2. 3. A group of organisms capable of reproducing and creating fertile offspring
  3. 6. A structure that is inherited from ancestors but has lost much or all of its function
  4. 10. The early development of many different kinds of animals; mammals, birds, reptiles, and fish look similar suggesting a common ancestor or relation
  5. 13. A characteristic or trait that improves an individual's ability to survive and reproduce in a particular environment
  6. 14. The amount of differences or variety between individuals of the same species
  7. 15. The ability of an animal to look like another more harmful animal
  8. 16. A structure that has the same function but different construction and was not inherited from a common ancestor
  9. 18. A tactic some organisms use are they blend into an environment or background to avoid potential predators
  10. 20. A change in the DNA sequence that affects genetic information
  11. 21. An organism that lived prior to and is related to an organism from another species
  12. 22. The preserved remains or traces of an organism that lived in the past
  13. 23. The children or young produce from the parent(s)
Down
  1. 2. A mechanism proposed by Charles Darwin that certain inherited traits tend to survive and reproduce at higher rates
  2. 4. A diagram that models that evolutionary relationships between species including their change through time
  3. 5. How well an organism can survive and reproduce in its environment
  4. 7. A structure that is similar in shape and appearance on different organisms but performs different functions
  5. 8. The divergence of a single species into two unique and distinct species
  6. 9. A diagram that is based on patterns of shared, derived traits and shows evolutionary relationships
  7. 11. The process by which humans breed only those organisms with desired traits to produce the next generation
  8. 12. The gradual change in a species over time
  9. 17. A characteristic of feature of an organism
  10. 19. A term that typically describes a species that no longer has any known living individuals