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ARC-Easy / LEAP__7_10341 / A scientist studied a species of fish. She found that when a certain nutrient…

Problem

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question

A scientist studied a species of fish. She found that when a certain nutrient was added to the diet of the fish just after hatching, the fish gained an average of 3 kilograms in the first year. What additional information is needed to determine whether the nutrient is affecting the growth of the fish?

choices

  • how much adult fish gained on average when the same nutrient was added to their diet
  • how much newly hatched fish in this species gain in the first year without the nutrient in their diet
  • how much of the nutrient is available for the fish species in their natural surroundings
  • how much other species of fish gain in the first year when the nutrient is added to their diet

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