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belka [17]
3 years ago
15

Scientists in Chicago measure the amount of oxygen and carbon dioxide in Lake Michigan. This helps them determine the health of

the lake ecosystem. In July, scientists noticed a large decrease in oxygen levels in the lake. The decrease in oxygen could be due to:
a) A decrease in fish populations.
b) A decrease in plant growth.
c) An increase in plant growth.
d) An increase in rain water supplied to the lake.​
Biology
1 answer:
WINSTONCH [101]3 years ago
3 0
B is the answer to the question
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