Question

Q. Which among the following are categorised under autotrophs?

Select the correct answer using the codes given below:

• A. 1 only
• B. 1 and 2 only
• C. 2, and 3 only
• D. 1, 2 and 3

Answer 1

The correct option is B 1 and 2 only

Explanation:

Statements 1 and 2 are Correct: Autotrophs comprise those species which produce their food themselves. These include: Phototrpohs - which prepare food through photosynthesis using solar radiation and Chemotrophs - which make food through chemosynthesis from inorganic substances by oxidation.

Statement 3 is incorrect: Saprophytes are Heterotrophs - dependent on other living organisms for food.