Biology

2. The three groups of primates are prosimians, monkeys, and ___.
5. Immediate ancestor of animals.
7. Unsegmented animals that lack a coelom.
10. Factors that limit large population.
12. Segmented animals with jointed appendages and a chitin-rich exoskeleton.
14. Most diverse arthropods
17. Population growth that stabilize indefinitely at the habitat' carrying capacity.
19. Aquatic, sessile animals that are either asymmetrical or radially symmetrical.
20. Helps determine the population size.
22. Bodies consist of repeated segments.

1. Unique stage in embryonic development of animals.
3. Sessile form of cnidarin.
4. Factors that limit population regardless of size.
6. Population growth that is proportional to the size of the population.
8. vascular system Enables echinoderms to move, sense their environment, acquire food, exchange gases, and get rid of metabolic wastes.
9. Study of relationship amongst organisms and the enviroment.
11. Spiny-skinned marine animals.
13. Improves flexibility and increases the potential for specialized body parts.
15. density Measure of the number of individuals per unit area of habitat.
16. Gastrula's first indentation form in the mouth.
18. Unsegmented worms that molt periodically.
21. Free swimming form of cnidarin.