36. The first organism in most natural food chains is

A. a herbivore
B. a decomposer
C. photosynthetic
D. carnivorous

37. The third kingdom, protista, as suggested by E.H. Haeckel includes

A. bacteria
B. algae
C. fungi
D. all of these

38. Eukaryotic cell organelles first emerged

A. from a specialized lineage of cells within the kingdom Protista
B. when prokaryotes engulfed each other and became interdependent
C. when bacteria made their first attempts at reproduction
D. just before the origin of the animal and fungal kingdoms

39. Who discovered the bacteria that cause cholera?

A. Pierre Berthelot
B. Robert Koch
C. Louis Pasteur
D. Rudolf Virchow

40. Prokaryotic microorganism include

A. protozoa
B. fungi
C. bacteria
D. all of these