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Suppose there are 500 units of energy available at the base of a pyramid of energy. How many units of that energy will be the first level consumers store? How many units will the second level consumer store?

50 units of energy will be the first level consumers stored.

5 units of energy will be the second level consumers stored.

Explanation:

In trophic levels, when we go in upward direction, only 10 percent of energy is transferred from one trophic level to another while 90 percent of energy is lost as heat energy in the ecosystem. So if plants contain 500 units of energy so only 50 units of energy which is 10 percent of total energy is transferred to primary consumers and from first level to second level consumer, only 5 units of energy is transferred.

d. the weight of the book

the index of refraction of the second medium is higher. i just took the test trust me !