Diagram of a food web (arrows represent energy flow and letters represent species)
-If the figure above represents a terrestrial food web, the combined biomass of C + D would probably be
A) greater than the biomass of A.
B) less than the biomass of H.
C) greater than the biomass of B.
D) less than the biomass of A + B.
E) less than the biomass of E.

Question

Diagram of a food web (arrows represent energy flow and letters represent species)
-If the figure above represents a terrestrial food web, the combined biomass of C + D would probably be
A) greater than the biomass of A. 
B) less than the biomass of H. 
C) greater than the biomass of B. 
D) less than the biomass of A + B. 
E) less than the biomass of E.

Quizplus · Accepted Answer

In a terrestrial food web, biomass generally decreases as you move up trophic levels from producers to primary consumers to secondary consumers, etc. Since C and D are likely to be at higher trophic levels than A (a producer) and B (probably a primary consumer), their combined biomass would be less than the combined biomass of A and B, following the principle of energy transfer efficiency in ecosystems.

Diagram of a Food Web (Arrows Represent Energy Flow and Letters