Question

question 3 of 10
your friend claims that a pyramid of biomass may not have the same shape as a pyramid of numbers for the same ecosystem, as shown in the diagram.
pyramid of biomass
trophic level
1
2
3
4
biomass (g c/m²)
pyramid of numbers
trophic level
1
2
3
4
number of individuals
which statement supports this claim?
a. a single large producer at the first trophic level would be shown as a large measure in the pyramid of biomass but a small measure in the pyramid of numbers.
b. a greater number of producers is always needed to provide the matter and energy needed by a large primary - consumer population.
c. a higher trophic level always contains fewer individuals and stores less energy than the trophic level beneath it.
d. a large population of consumers at the second trophic level can provide the energy needed to support the smaller population of producers at the first trophic level.

Explanation:

In a pyramid of biomass, mass is measured, so a large - sized producer has high biomass. In a pyramid of numbers, just the count of individuals is considered, and a single large producer is just one individual, thus having a small measure in the pyramid of numbers. This shows that the shapes of the two pyramids can differ.

Answer:

A. A single large producer at the first trophic level would be shown as a large measure in the pyramid of biomass but a small measure in the pyramid of numbers.