What are the four most common elements found in living organisms?
A. nitrogen, oxygen, phosphorus, and carbon
B. carbon, oxygen, nitrogen, and hydrogen
C. carbon, oxygen, potassium, and calcium
D. oxygen, calcium, hydrogen, and carbon
Answer:B
What are the four most common elements found in living organisms?
A. nitrogen, oxygen, phosphorus, and carbon B. carbon, oxygen, nitrogen, and hydrogen C. carbon, oxygen, potassium, and calcium D. oxygen, calcium, hydrogen, and carbon