Question

Two different species of bacteria are examined. Scientists find that species X always produces CO2 and H2O during cellular respiration. Species Y always produces ethyl alcohol and CO2. Which conclusion can be made from these observations?(1 point) Responses Both species X and Y are aerobic Both species X and Y are aerobic Only species Y is aerobic Only species Y is aerobic Only species Y is anaerobic Only species Y is anaerobic Both species X and Y are anaerobic

Answer 1

From the observations provided:

• Species X produces CO2 and H2O during cellular respiration, which indicates that it undergoes aerobic respiration (as these products are typical of complete oxidation of glucose in the presence of oxygen).
• Species Y produces ethyl alcohol and CO2, which indicates that it undergoes fermentation or anaerobic respiration (since this type of respiration occurs in the absence of oxygen).

Based on these definitions, we can conclude that:

• Species X is aerobic (requires oxygen for respiration), while
• Species Y is anaerobic (does not require oxygen for respiration).

Therefore, the correct conclusion is: Only species Y is anaerobic.