Asked by Supreme $TO
A second ecosystem is created in a bottle that contains water, elodea, and air. Which ecosystem allows the elodea to continue the process of photosynthesis over a longer period of time?
A.
The first ecosystem, because the snails take in carbon dioxide and release oxygen.
B.
The first ecosystem, because the snails take in oxygen and release carbon dioxide.
C.
The second ecosystem, because the elodea will no longer need to compete with the snails for oxygen.
D.
The second ecosystem, because the elodea will no longer need to compete with the snails for carbon dioxide.
All Answers 1
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B.
In a closed bottle the snails respire (they take in O2 and release CO2). The CO2 they produce supplies the elodea with the carbon dioxide needed for photosynthesis, so the presence of snails lets the elodea photosynthesize for a longer time than a bottle with only water, elodea, and air.
In a closed bottle the snails respire (they take in O2 and release CO2). The CO2 they produce supplies the elodea with the carbon dioxide needed for photosynthesis, so the presence of snails lets the elodea photosynthesize for a longer time than a bottle with only water, elodea, and air.
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