Question

Choose correct combinations

• A. I, III
• B. II, IV
• C. III, IV
• D. I, II

Hint:

Rhodopseudomonas uses organic carbon, and Bacillus uses carbon from dead organic matter. Methanogens and Chlorobium use CO\(_2\) and inorganic substances, respectively.

Answer 1

The Correct Option is C

Analysis of the Combinations

Let's analyze the combinations:

• I. Carbon from atmospheric CO₂: This is correct for Methanogens, which are a type of archaea that obtain carbon from atmospheric CO₂ and use it for energy.
  Therefore, I corresponds to Methanogens.
• II. Energy from oxidation of inorganic substances: This statement correctly describes the behavior of Chlorobium, a type of bacteria that uses the oxidation of inorganic substances as a source of energy, usually for photosynthesis.
• III. Only carbon from organic sources: This statement is true for Rhodopseudomonas, which is a bacterium that uses only organic carbon sources for its energy needs.
  Therefore, III corresponds to Rhodopseudomonas.
• IV. Carbon from dead organic sources: This is correct for Bacillus, which is a genus of bacteria that uses organic matter from dead organisms as a carbon source.
  Hence, IV corresponds to Bacillus.

Thus, the correct combinations are III (Only carbon from organic sources - Rhodopseudomonas) and IV (Carbon from dead organic sources - Bacillus).

Therefore, the correct answer is (3) III, IV.