What Is Life?

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Across
  1. 2. Humans have opposable thumbs, which give people the ability to grasp things. The opposable thumb is an example of a _________________.
  2. 4. Study of animal development.
  3. 5. Classification of life.
  4. 9. Shivering and goosebumps are examples of the body's _____________.
  5. 12. Maturing involves both growth and _______________.
  6. 14. Study of cellular activities.
  7. 16. Natural ____________ is Darwin's theory that explains how evolution works.
  8. 17. The esophagus, stomach and intestine belong to the same organ ____________.
  9. 18. The organization of body structures.
  10. 19. A deer freezes when it hears a gunshot. The gunshot is the ____________ of this behavior.
  11. 21. The function of body structures.
  12. 22. Smallest unit of life.
  13. 25. Study of how living things interact with the environment.
Down
  1. 1. Study of ancient life.
  2. 3. Examples include the heart, the kidney, the liver.
  3. 6. Group of cells that work together.
  4. 7. A living thing.
  5. 8. Study of disease.
  6. 10. The number of parents involved in asexual reproduction.
  7. 11. Bees, bats and bananas all perform __________ reproduction.
  8. 13. What happens to a species that does not respond to changes in the environment.
  9. 15. Study of the inheritance of traits.
  10. 20. Organisms that can interbreed and produce fertile offspring belong to the same ____________.
  11. 23. Study of plants.
  12. 24. The body needs a constant supply of material and energy in the form of ___________.