The oxidation of ammonia (NH4+) to nitrate (NO3-) and nitrite (NO2-) is called ________.
A. ammonification
B. nitrogen fixation
C. photosynthesis
D. nitrification
E. denitrification
Answer: D
You might also like to view...
Which of the following is (are) a sterilizing gas(es) that can be used on heat-sensitive materials?
A. Glutaraldehyde B. Ethylene oxide C. Chlorine gas D. Isopropanol
Which of the following is important to the development of dorsal structures such as the neural tube and notochord?
A. Spemann's organizer B. noggin C. cadherins D. both Spemann's organizer and noggin E. both Spemann's organizer and cadherins
Most marine animals have an osmolarity of about ____ mOsm/L
a. 5 b. 225 c. 300 d. 1000 e. 1500
Proto-oncogenes can be converted to oncogenes by:
a. mutation. b. tumor suppressor genes. c. growth factors. d. transcription factors. e. infection by certain viruses.