Which Two Elements Make Up More Than 90% of the Dry

Question

Which two elements make up more than 90% of the dry weight of plants?
A)carbon and nitrogen
B)oxygen and hydrogen
C)nitrogen and oxygen
D)oxygen and carbon
E)carbon and potassium

Accepted Answer

Oxygen and carbon make up more than 90% of the dry weight of plants, with carbon being the primary element due to its role in photosynthesis and the creation of organic compounds, and oxygen being a key component of those organic compounds as well as being essential for respiration.