___________________ 1. A nervous system regulates an animal's __?__ to its environment.

___________________ 2. What do we call animals that eat only meat?

___________________ 3. A pie has __?__ symmetry.

___________________ 4. What do we call animals that eat decaying plant and animals?

___________________ 5. The skeletons of insects are _____.

___________________ 6. Many simple animals can function with out an __?__ system?

___________________ 7. In Figure 51, are the structures labeled f produced sexually or asexually?

___________________ 8. The mesoglea is a thick layer in polyps. T F

___________________ 9. The __?__ is the upper side of an animal with bilateral symmetry.

___________________ 10. Animal must have a __?__ system for the species to survive.

___________________ 11. What do we call animals that eat both plant and meat?

___________________ 12. Any animal that lacks a backbone is a (an) _____.

___________________ 13. Where are simple sense organs found in most bilateral animals?

___________________ 14. Unlike plant cells, animal cells do not have

___________________ 15. The front of an organism is the

___________________ 16. What do we call animals that eat only plants?

___________________ 17. Animal without vertebrae are called?

___________________ 18. Our textbook refers to a "division of labor as

___________________ 19. The __?__ is the back side

___________________ 20. The __?__ is the lower side

___________________ 21. Animals that have body parts that repeat around an imaginary line drawn through the center of the body.

___________________ 22. Small cluster of nerve cells are called

___________________ 23. __?__ are animals without backbones.

___________________ 24. Worms have__?__ symmetry.

___________________ 25. The __?__ is the front end.

___________________ 26. Small clusters of nerve cells form _____.

___________________ 27. The __?__ is the front side

___________________ 28. What kind of symmetry does an organism have when it can divide down its length into similar right and left halves that form mirror images.

___________________ 29. One evolutionary trend is that more complex animals have a concentration of

___________________ 30. Animals that are not sessile are motile, which mean they have

___________________ 31. The gathering of sense organs into the head region is called

___________________ 32. The tail of a frog is at the _____ end.

___________________ 33. multicellular animals evolved from the

___________________ 34. The __?__ is the rear end.

___________________ 35. What do we call a multicellular eukaryotic heterotroph without cell walls.

___________________ 36. Animals with __?__ have specialized front and back ends as well as upper and lower sides.

___________________ 37. What do we call the process by which a cell consume oxygen and gives of CO₂?

___________________ 38. A(n) __?__ is an external framework for support.

___________________ 39. Cellular metabolism produces chemical waste that must be removed by a __?__ system.

___________________ 40. What do we call animals with backbones or vertebral column?

___________________ 41. An animal is each of the following except

___________________ 42. Some animals have what the textbook calls "indirect development" or