5 Written Questions
5 Matching Questions
- Spherical symmetry
- a Nervous tissue, E.T.
- b No body cavity. After blastula formation, cells reorganize to form adult body.
- c Whip like organelle of locomotion.
- d Any plane passing through the center divides the body into mirrored halves. Best suited for floating and rolling. Found chiefly among some unicellular forms. Rare in animals.
- e Scale of analysis above species level occurs over geologic time (great periods of time). A change in the characteristics of a lineage through time. Change in allele frequencies through time.
5 Multiple Choice Questions
- Two distinct tissue layers derived from embryonic germ layers. Ectoderm and Endoderm.
- Scale of analysis at the species or population level variation within a population. Changes in allele frequency from one generation to the next.
- No division of labor. Cells live in colonies/groups, not one organism.
- Central Body Cavity. Called a coelom. True body cavity (completely lined by mesoderm)
- A hair like, vibratile organelle process found on many animal cells. Cilia may be used in moving particles along the cell surface, or in ciliated unicellular forms, for locomotion.
5 True/False Questions
Triploblastic → Two distinct tissue layers derived from embryonic germ layers. Ectoderm and Endoderm.
Radial Symmetry → Body divided into similar halves by more than 2 planes passing through longitudinal axis. Usually sessile, freely floating, or weakly swimming animals. No anterior or posterior ends. Can interact with environment in all directions.
Cellular → Cells demonstrate division of labor but are not strongly associated to perform a specific collective function.
Pseudocoelomate → Central Body Cavity. Called a coelom. True body cavity (completely lined by mesoderm)
Bilateral → Organism can be divided along a sagittal plane into to mirror portions. Much better fitted for directional movement. Associated with cephalization.