Zoology and Chemistry

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Across
  1. 4. when a group of birds fly and stick together
  2. 9. When apex predators of the same species hunt together in small groups.
  3. 11. An animal at the top of a trophic pyramid who does not have an predators of its own
  4. 13. The number of protons and neutrons found in an element
  5. 15. An educated guess after research
  6. 17. an element that has gained or lost an electron.
  7. 18. Gamete of the male salmon
  8. 19. Basic unit of matter and the defining structure of elements
Down
  1. 1. used for gas exchange on a shark
  2. 2. found on a bony fish but not on cartilaginous fish
  3. 3. when a group of fish stick together
  4. 5. The number of protons found in an element
  5. 6. An evolutionary trait that animals have developed to increase their ability to survive
  6. 7. the long folds of tissue found in the shark's stomach usedto expand the stomach when consuming prey.
  7. 8. when bugs group together to attack a certain organism.
  8. 10. when an apex predator is added to an ecosystem and it affects all the trophic levels below that predator
  9. 12. Gamete of the female salmon
  10. 14. when groups of cattle animals group together to keep each other safe.
  11. 16. a behavior that animals learn from watching other animals
  12. 20. Regurgitated mass of indigestible bones, feathers, and fur