Question Detail
Question
In this type of autotrophic nutrition, the primitive autotrophic prokaryotes used chemical (glycolytic) energy to make carbohydrates from H2S and CO2.
Correct Answer
Option C is the correct answer.
Detailed Explanation
Chemosynthesis is a process by which certain organisms, primarily bacteria and archaea, create organic compounds (carbohydrates) using energy derived from chemical reactions, rather than sunlight. The use of H2S (hydrogen sulfide) as an energy source is characteristic of many chemosynthetic organisms found in environments like deep-sea vents. Photosynthesis uses light energy. Heterotrophic and holozoic describe modes of nutrition where organisms consume other organisms.
Hint
Focus on the 'chemical energy' aspect for making food, distinct from light energy.