Chapter 12 Vocab

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Across
  1. 3. an inherited trait that increases an organism's chance of surviving and reproducing
  2. 5. a tiny hole on the surface of an organism where oxygen enters the body and carbon dioxide leaves the body
  3. 6. give an account in words of someone or something, including all the relevant characteristics, qualities, or events
  4. 9. a system that transports blood and other fluids into open spaces that surround organs in the body
  5. 10. examine methodically and in detail the structure of something
  6. 13. the process by which organisms with variations that help them survive in their environments live longer, compete better, and reproduce more than those who lack the variations
  7. 16. a mutual relationship or connection between two or more things
  8. 19. a muscular pouch similar to a stomach that is used to grind food
  9. 21. the movement of substances from an area of higher concentration to an area of lower concentration
  10. 23. a scientific procedure undertaken to make a discovery, test a hypothesis, or demonstrate a known fact
  11. 24. occurring continuously over a period of time, the factors in an experiment that do not change
  12. 25. explain the meaning of something
  13. 26. a specialized structure in the digestive system where ingested material is stored
Down
  1. 1. make an idea, situation, or problem clear to someone by offering more detail or revealing relevant facts or ideas
  2. 2. a possible explanation for an observation that can be tested by scientific investigations
  3. 4. a netlike control system that sends signals to and from all parts of the body
  4. 7. a system that transports materials through blood using vessels
  5. 8. A permanent change in the sequence of DNA
  6. 11. a judgment or decision reached by reasoning, the end or finish of an event or process
  7. 12. a fluid filled internal cavity surrounded by muscle tissue
  8. 14. give a brief statement of the main points of something
  9. 15. a fluid filled cavity in the body of an animal
  10. 17. the process in which nutrients from digested food are taken into the body
  11. 18. organs that exchange carbon dioxide for oxygen in water
  12. 20. an organism's genetic material
  13. 22. the wavelike motion of some animals