Animal Crossword Puzzle

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Across
  1. 2. Body plan with left and right halves that are mirror images.
  2. 3. Hydraulic system in echinoderms used for movement and feeding.
  3. 8. Shedding of an exoskeleton to allow for growth.
  4. 10. Cold-blooded; body temperature depends on the environment.
  5. 12. External skeleton providing support and protection.
  6. 14. Animals without a backbone.
  7. 16. Asexual reproduction where a new organism develops from an outgrowth or bud.
  8. 18. An organism that has both male and female reproductive organs.
  9. 20. Lack of symmetry; no regular body shape.
  10. 21. Animals with a backbone.
Down
  1. 1. Warm-blooded; able to regulate body temperature internally.
  2. 4. Eggs with a protective shell and membranes, adapted for land reproduction.
  3. 5. in placental mammals that nourishes the developing fetus.
  4. 6. Internal skeleton providing support.
  5. 7. Flexible connective tissue making up the skeleton of some fishes.
  6. 9. Free-swimming body plan of cnidarians; sexual reproduction.
  7. 11. Milk-producing glands in mammals.
  8. 13. Organisms that live on or near the ocean floor.
  9. 15. Body parts arranged around a central axis.
  10. 17. Gas-filled organ in bony fish used to control buoyancy.
  11. 19. Sessile body plan of cnidarians; generally asexual.