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Biology, 25.10.2019 23:43, AgentPangolin
The following aquariums were set up witht he same volume of water. (elodea is an awautic green plant.)
aquarium 1: elodea only
aquarium 2: elodea and an aquatic snail
aquarium 3: aquatic snail only
which aquariums will establish a cycle of carbon dioxide and oxyfen gas flow if placed in the ddark for serveral weeks
a: 1,2, and 3
b: 2 and 3
c: 3 only
d: none
![answer](/tpl/images/cats/otvet.png)
Answers: 1
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The following aquariums were set up witht he same volume of water. (elodea is an awautic green plant...
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