The Lake Erie ecosystem was affected by humans because human activities ____

a. extracted resources without replacement
b. caused global warming
c. used the water without replacement
d. disrupted energy flow and the cycling of nutrients
e. extracted energy without replacement


ANSWER: d

Biology & Microbiology

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Indicate whether the statement is true or false.

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The yolk, which is a component of many animal eggs, contains a mixture of____

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