Which statement below best describes the ways that energy and pesticides are transferred between levels is food chains?

Easy

A

Available energy increases and pesticide concentrations increase as you move up a food chain
B

Available energy decreases and pesticide concentrations increase as you move up a food chain.
C

Available energy decreases and pesticide concentrations decrease as you move up a food chain
D

Available energy increases and pesticide concentrations decrease

Solution

When energy flows from a particular trophic level to the next trophic level, some energy is always lost as heat at each step. Hence, the energy decreases from one trophic level to another.
Toxic substances on other hand increase in successive trophic levels as they are neither metabolised not excreted.

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