Scenario 2 biology students prepared five 2-liter beakers of water at the following temperatures: 18 °c, 22 °c, 26 °c, 30 °c, and 34 °c. the temperature of the aquarium in their classroom was 22 °c so they used that temperature as their control. they removed goldfish from their aquarium and placed three in each beaker. for five minutes, they counted and recorded number of times the gill covers opened and closed for every goldfish. constant