The following diagram shows an energy pyramid for a river ecosystem. The amount of available energy at each trophic level is given as a rate of energy flow, measured in \pu{kcal/m2/yr}kcal/m 2
/yrk, c, a, l, slash, m, squared, slash, y, r.
A diagram showing four rectangles stacked in a pyramid shape. From bottom to top, each rectangle gets smaller and shows energy values in kilocalories per meter squared per year. The producer level at the bottom has a value of twenty thousand eight hundred and ten. Above this the primary consumer level has a value of three thousand three hundred and sixty eight. Above this, the secondary consumer level has a value of three hundred and eighty three. At the top is the tertiary consumer level with a value of twenty one.
A diagram showing four rectangles stacked in a pyramid shape. From bottom to top, each rectangle gets smaller and shows energy values in kilocalories per meter squared per year. The producer level at the bottom has a value of twenty thousand eight hundred and ten. Above this the primary consumer level has a value of three thousand three hundred and sixty eight. Above this, the secondary consumer level has a value of three hundred and eighty three. At the top is the tertiary consumer level with a value of twenty one.
Which of the following statements help explain the energy difference between the secondary consumer level and the tertiary consumer level in the pyramid shown above?
Choose 2 answers:
Choose 2 answers:

(Choice A)
A
Tertiary consumers ate only a small portion of the available secondary consumers.

(Choice B)
B
Some of the secondary consumers’ energy went toward cellular respiration, and some dissipated as heat.

(Choice C)
C
More new energy was created by the secondary consumers than by the tertiary consumers.