I think A but I'm not totally sure!! Good luck.
I believe the correct response is D. A single variable.
If no<span> oxygen is available, </span>yeast will<span> switch over to a process called anaerobic respiration in this process, </span>glucose<span> (</span>sugar<span>) is fermented to </span>produce<span> energy, </span>carbon dioxide<span>, and ethanol. And they </span>can<span> only </span>produce<span> energy when the have </span>glucose.
Chromosomes are thread-like structures located inside the nucleus of animal and plant cells. Each chromosome is made of protein and a single molecule of deoxyribonucleic acid (DNA<span>). Passed from parents to offspring, </span>DNA<span> contains the specific instructions that make each type of living creature unique.</span>
I think it’s C not completely sure but it’s the most likely there isn’t anything with mechanical so this would be most likely