Many small aquatic animals eat algae for their main diet. A group of such animals consume 1,000 calories of algae, retaining 150 calories to pass on to the next higher trophic level. What percentage of the energy was lost

         These animals will lose 85% of the energy, but be careful, this energy is not just going to be lost, they're using it to catch more energy.

Explanation:

         To solve this problem, you're going to use the Rule of Three, and by that, you can find that, 150 calories are equivalent to 15% of the whole 1000 calories that this group of animals consume. If they pass only 15% of these calories to the next higher trophic level, that means that 85% of this energy will be used during their lifetime, either they use it to reproduce themselves, or to find more energy sources such as other algaes.

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Explanation:

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