Chapter 8, Problem 8A

Summary Introduction

Introduction :

The Sun is the ultimate source of energy. The radiant energy from the Sun is used by green plants to synthesize food (glucose), chemical energy. Thus, light energy is converted to chemical energy. The chemical energy is transferred to animals through food chains.

Answer to Problem 8A

Correct answer :

The correct answer is option (C) the Sun.

Explanation of Solution

Explanation/justification for the correct answer :

Option (C) the Sun. The energy coming from the Sun is captured by green plants through the photosynthesis. During photosynthesis, the energy of the sun is fixed into chemical energy (carbohydrate). The food prepared by the green plants is the source of energy for other consumers. Thus, the correct answer is an option (C).

The explanation for the incorrect answer :

Option (A) chemoautotroph. Some autotrophs that use inorganic substances such as hydrogen sulphide as a source of energy are called chemoautotroph. Thus, this is an incorrect option.

Option (B) heterotroph. Heterotrophs are organisms which obtain food from autotrophs to obtain energy. Thus, this is an incorrect answer.

Option (D) photoautotrophs. Autotrophs that convert energy from the Sun are called photoautotrophs. Photoautotrophs provide food to many. Thus, this is an incorrect answer.