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