Which of the following would be an example of an ecoregion? A. Antartica
B. A backyard
C. The United States
D. A small section of the Mississippi River

2. if scientists identify an animal with bilateral symmetry and no segmentation, which phylum can it definitely not belong to? a. roundworms b. annelids c. mollusks d. flatworms

Nerve cells are specialized to respond to stimulitrue or false?

Which statement best describes a typical difference that could be found between the “analysis” and “conclusion” sections of a lab report?