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

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 aerobic
Both species X and Y are aerobic

Both species X and Y are anaerobic

Answer 1

Based on the observations provided, the correct conclusion is:

**Only species Y is anaerobic.**

Here's the reasoning:

- Species X producing CO2 and H2O during cellular respiration indicates it is undergoing aerobic respiration, where oxygen is used, and the byproducts are carbon dioxide and water.
- Species Y, producing ethyl alcohol and CO2, suggests it is undergoing alcoholic fermentation, which is a type of anaerobic process (it does not use oxygen).

Therefore, species Y is the one that is anaerobic, while species X is aerobic.