Midterm- SCI 130

If you were to examine an area of shallow seawater, you may notice long-stemmed plant-like organisms anchored to rock but with floating leaf-like structures that grow at an incredible rate, about 30 cm per day. To what group do they belong?
 A. Sporozoans. 
 
 B. Diatoms. 
 
 C. Brown algae. 
 
 D. Dinoflagellates. 
 
 E. Red algae.

Some primitive organisms are of major commercial importance as sources of antibiotics such as penicillin. A species of which group would produce penicillin?
 A. Ciliates. 
 
 B. Fungi. 
 
 C. Flagellates. 
 
 D. Amebas. 
 
 E. Dinoflagellates. 

If you encountered a seafloor formation that you suspected was composed largely of diatom or foraminiferan skeletal material, a diagnostic test to identify foraminiferans would detect which compound?
 A. Carrageenan. 
 
 B. Chlorophyll a. 
 
 C. Agar. 
 
 D. Calcium carbonate. 
 
 E. Silica.