a
Pond
b
Aquarium
c
Lake
d
Puddle
Explanation
Correct Option
bNo explanation available
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Discussions (2)
Chrisplendour
2 months ago
Aquariums are artificial environments that are regularly cleaned, filtered, and treated to remove debris and harmful microorganisms. Because they often lack the high concentration of free bacteria and decaying organic matter that Paramecium requires for food, these organisms are generally absent from well-maintained tanks.
