Questions: Question 15 (3 points) What kind of organism are you? Photoorganohetertroph Chemoorganoheterotroph Chemolithoautotroph Photolithoautotroph Chemolithoheterotroph

The answer is the second one: Chemoorganoheterotroph.

Explanation for each option:

1. Photoorganoheterotroph: These organisms obtain their energy from light and their carbon from organic compounds. Humans do not use light as an energy source.

2. Chemoorganoheterotroph: These organisms obtain both their energy and carbon from organic compounds. Humans fall into this category as they consume organic matter (food) for both energy and carbon.

3. Chemolithoautotroph: These organisms obtain their energy from inorganic compounds and their carbon from carbon dioxide. Humans do not use inorganic compounds for energy nor do they fix carbon dioxide.

4. Photolithoautotroph: These organisms obtain their energy from light and their carbon from carbon dioxide. Examples include plants and certain bacteria, but not humans.

5. Chemolithoheterotroph: These organisms obtain their energy from inorganic compounds and their carbon from organic compounds. Humans do not use inorganic compounds for energy.

Summary: Humans are chemoorganoheterotrophs because they derive their energy and carbon from organic compounds.