Biology Vocabulary I

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Across
  1. 3. Animals having a constant body temperature
  2. 7. The action or process of grouping something according to shared qualities or characteristics
  3. 11. A green pigment present in all green plants that provides energy for the plant
  4. 12. Animals without a backbone
  5. 15. A change over time
  6. 16. Term meaning "front"
  7. 18. The study of living things
  8. 19. A slender tube or vessel
  9. 20. On the belly surface
  10. 23. An animal that eats meat
  11. 24. Jointed foot
Down
  1. 1. "Without trachea"
  2. 2. To cut open or apart
  3. 4. Animals that live in water
  4. 5. The seasonal movement of animals from one region to another
  5. 6. The study of plants
  6. 8. Animals having a body temperature that varies with the environment
  7. 9. Animal that has a backbone
  8. 10. Term meaning "back"
  9. 13. Segmented or ringed
  10. 14. Another term meaning "back"
  11. 16. Animals with wings
  12. 17. External body covering
  13. 21. The process by which green plants use sunlight to make their own food
  14. 22. A system of classification