The Diversity of Living Things

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Across
  1. 4. When there are no more members of a species left on Earth
  2. 6. Minimum Viable Population
  3. 10. Different gene versions
  4. 12. Formed around 4.5 billion years ago
  5. 13. Occurs when two or more populations no longer successfully reproduce
  6. 15. A famous transition fossil
  7. 16. Narrow strip of land connecting North and South America
  8. 17. Only 1 in about 2 million lobsters are this color
  9. 18. Traits/Behaviors that are beneficial for survival
  10. 20. Most fossils found in this rock
  11. 23. 50% or more of all species on Earth disappear
  12. 24. Molecules needed to build and repair body structures
Down
  1. 1. Humans decide which traits are beneficial
  2. 2. A group of individuals that can reproduce successfully
  3. 3. The Ashfall Fossil Beds are found in this state
  4. 5. Proteins are made up of these smaller molecules
  5. 7. Layer that absorbs UV rays from the sun
  6. 8. Changes to DNA
  7. 9. Collection of all known fossils
  8. 11. Change in inherited traits of a population over many generations
  9. 14. The environment decides which traits are benficial
  10. 19. Millions of years ago
  11. 21. Fossilized tree sap
  12. 22. Have been extinct for around 65 million years