I’m pretty sure it’s the second one
Answer;
Glucose
The nutrient that can be used to produce energy in the absence of oxygen is glucose.
Explanation;
Production of energy without using glucose is called anaerobic respiration. During this type of respiration less energy is released than the case of aerobic respiration. This is because the breakdown of glucose is incomplete. Anaerobic respiration produces an oxygen debt, which is the amount of oxygen needed to break lactic acid to carbon dioxide and water.
Answer:
a person or thing that prevents incompatible or antagonistic people or things from coming into contact with or harming each other:
Explanation:
Researchers refer to DNA found in the cell's nucleus<span> as nuclear DNA. An organism's complete set of nuclear DNA is called its genome. Besides the DNA located in the </span>nucleus<span>, humans and other complex organisms also have a small amount of DNA in cell structures known as </span>mitochondria<span>.</span>
