<span><span>the relevant controlled variable is the frog's body temperature, heart rate, breathing rate, and blood pressure. The controlled is a neutral pH level of 7 for the water that the frog is placed in, so that it does not obscure the effects of the water temperature on the frog's physiological factors.</span>
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Answer:
what are the options?
may I get brainliest please?
Answer:
Humans are moving more Carbon into the atmosphere with things like fossil fuels. We are also cutting down trees and other plants that actually take carbon away from our atmosphere through photosynthesis and adding oxygen. This is causing the carbon to get stuck in the atmosphere and contaminating our air.
Explanation:
The first one is planting other crops
To explain everything, like the theory of that the sun revolved around earth but we now found out that earth revolves around the sun and there are more planets out there in the milky way!
hope it helps!
