The correct answer is letter A. The disk soaked in distilled water is the controlled variable because it is the only differential factor from all of the other variables which are all disinfectants. Controlled variables are elements that are not changed throughout the experiment. When something is unchanged it is better for scientists to analyze the relationships of other variables better.
Answer:
anaerobic organisms do not require the presence of oxygen to produce energy in form of ATP, while aerobic organisms require oxygen
Explanation:
Anaerobic organisms produce energy by glycolysis, which is a metabolic pathway that produces ATP by transforming glucose to lactate when oxygen (O2) is limited. Glycolysis produces two (2) molecules of ATP per glucose molecule. Moreover, when O2 is available, aerobic organisms produce ATP by cellular respiration, which includes glycolysis, the Krebs cycle, and oxidative phosphorylation. Cellular respiration is able to produce thirty-eight (38) molecules of ATP per glucose molecule, thereby being more efficient than glycolysis.
1. Biological Processes
2. Geological Processes
3. Chemical and Physical Processes
<span>4. Human Activity ( hope this helps )</span>
Answer:
D.
Explanation:
It will stay the same no matter how the atoms are rearranged
