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Biology, 21.07.2019 10:30, livigrace9004
Astudent creates a model of a closed ecosystem by filling a glass tank half full with water, then adding 10 snails and two small aquatic plants. the next day, all the snails are dead. which action would have been most likely to keep the snails alive? a. adding more plants b. adding nitrogen c. adding more water d. adding another animal species
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