Answer:
It's Gills because there not human and use gills to breathe in water
Answer:
B. presence of oxygen in the atmosphere
Explanation:
I took the same test and got it right
An independent variable that is manipulated means to achieve a particular effect or tested to determine if it is the cause of the effect.
For example, to find out if your weight depends on the amount of calories you consume, you could lower your caloric intake (calories is the manipulated variable) for a period of time and see how your weight changes in response.
Explanation:
the Krebs cycle occurs on the mitochondrial matrix and generates a pool of chemical energy from the oxidation of pyruvate, the end product of glycolysis. pyruvate is transported into the mitochondria and loses carbon dioxide to form acetyl-CoA, a 2-carbon molecule