Mary Beth bought 15 ghost shrimp. She put 5 in a small fish bowl, 5 in a larger tank, and 5 in an artificial pond in her backyard. What are the two controlled variables (CONSTANTS) Mary Beth should have to be able to tell whether the size of the tank affects the size of the shrimp after 6 month

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Explanation:

if she has 15 and she put those 5 in a fish bowl well give her 10 then a lager tank that well give her 5  and then she putes those 5 in the pond she has used all her ghost shrimp

the darker peppered moth species were favored due to the fact that the industrial revolution had made all the nearby trees a darker color instead of white.