2. Metazoan organisms with _____ symmetry are mostly sessile or sedentary.
A. bilateral
B. coelomic
C. spherical
D. radial
3. During embryonic development, your digestive tract was formed from the _____.
A. mesoderm
B. epiderm
C. endoderm
D. ectoderm
4. The most likely ancestor of metazoan animals was a _____.
A. amoeboid protist
B. flagellated protist
C. green plant
D. multicellular fungus
E. red alga
5. As metazoan animals diversified, the trait of _____ likely evolved more than once.
A. triploblastic tissues
B. segmentation
C. bilateral symmetry
D. protostome-type development
E. cephalization
6. The coelom of animals has an important role in _____.
SELECT ALL THAT APPLY:
A. lowering surface area
B. regional compartmentalization
C. organ development
D. increase in body size
E. preventing storage of reserves
10. Which of the following traits is present in nematode worms and annelid worms?
A. A digestive tract with an oral and anal opening.
B. Well-defined segmentation.
C. Molting by ecdysis.
D. Exclusively parasitic lifestyle.
Please answer all questions!!