Question 12



Based on the pyramid, which organism(s) provide the MOST available energy?

a
insects and zooplankton
b
phytoplankton and bacteria
c
predator fish
d
birds and mammals

1 answer

In an ecological pyramid, energy decreases as you move up the trophic levels. The base of the pyramid typically consists of primary producers (like phytoplankton and bacteria), which convert sunlight into biomass through photosynthesis. These organisms provide the most available energy because they capture energy directly from the sun.

Based on this understanding, the correct answer to the question would be:

b. phytoplankton and bacteria

These organisms form the foundation of the energy pyramid and provide the most energy available to the entire ecosystem.

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