Chapter 9 Science Review

4. Arthropods have a head, a thorax, and an __________
7. This might be confused with an invertebrate.
9. These do not have blood vessels.
11. cord The human brain and spinal cord develop from this structure.
12. What is a body plan which cannot be divided into any two parts that are nearly mirror images?
13. Small chordate animals which live in sand just off of ocean shores.
14. What is a body plan in which an organism can be divided into two parts that are mirror images of each other anywhere through its central axis?
16. What is a characteristic common to all animals?
17. What type of chordates are cats, dogs, fish, snakes, frogs, and birds?
19. What has a hard outer covering, bilateral symmetry, 3 body parts and most are insects?
20. A trait that makes a population a better match for its environment and helps it survive.
21. Plants and animals both have cells with __________

1. They have no backbones.
2. This is an animal because it is multicellular, has collagen, and does not make its own food.
3. What is a body plan in which an organism can be divided into two halves that are mirror images of each other?
5. Example of bilateral symmetry.
6. Mammals are the only group of vertebrate chordates that produce ___________
8. These have backbones.
10. A lancelet is classified as an invertebrate chordate because it can _________, lives near the ocean, and lives under the ground.
11. Typical chordate characteristics include tail, nerve cord, and ?
15. What structural adaptation made it possible for vertebrates to reproduce on land?
18. Group of animals most closely related to segmented worms.