With reference to maintenance functions in organisms, consider the following statements: 1. The transfer of energy source from outside to inside is referred to as respiration. 2. These processes require energy sourced from outside the body. 3. All organisms obtain energy directly from sunlight. Which of the statements given above is/are correct?

The correct option is 2 only Explanation Living organisms are organized structures that require continuous maintenance to prevent breakdown due to environmental effects. This maintenance function requires energy, which must be acquired from the external environment. Statement-wise Analysis: - Statement 1 is Incorrect: Maintenance processes (such as repair, growth, and molecular movement) require energy. Since energy is constantly expended by the organism, it must be sourced from outside the body. This energy source is generally referred to as food. - Statement 2 is Correct: The process of transferring a source of energy (food) from outside the body to the inside is technically referred to as nutrition. Respiration is the process of breaking down these food sources (often using oxygen acquired from outside) to release energy for cellular needs. - Statement 3 is Incorrect: Not all organisms obtain energy directly from sunlight. Only autotrophs (such as green plants and certain bacteria) utilize sunlight to create food via photosynthesis. Heterotrophs (such as animals and fungi) depend on complex organic substances derived from other organisms for their energy. Key Takeaway: Nutrition is the intake of energy sources (food) from the outside, whereas Respiration is the metabolic process of breaking down that food to release energy for life processes.

With reference to maintenance functions in… - NCERT Class 10 Science MCQ

NCERT Class 10 Science — Chapter 1: Life Processes

mcqmedium

With reference to maintenance functions in organisms, consider the following statements:

The transfer of energy source from outside to inside is referred to as respiration.
These processes require energy sourced from outside the body.
All organisms obtain energy directly from sunlight.

Which of the statements given above is/are correct?

NCERT textbook question

From NCERT Science - class 10 · Page 80

Options

A1, 2 and 3
B2 only
C1 and 3 only
D1 only

Did you get this right?

Solution

The correct option is

2 only

Explanation

Living organisms are organized structures that require continuous maintenance to prevent breakdown due to environmental effects. This maintenance function requires energy, which must be acquired from the external environment.

Statement-wise Analysis:

Statement 1 is Incorrect: Maintenance processes (such as repair, growth, and molecular movement) require energy. Since energy is constantly expended by the organism, it must be sourced from outside the body. This energy source is generally referred to as food.
Statement 2 is Correct: The process of transferring a source of energy (food) from outside the body to the inside is technically referred to as nutrition. Respiration is the process of breaking down these food sources (often using oxygen acquired from outside) to release energy for cellular needs.
Statement 3 is Incorrect: Not all organisms obtain energy directly from sunlight. Only autotrophs (such as green plants and certain bacteria) utilize sunlight to create food via photosynthesis. Heterotrophs (such as animals and fungi) depend on complex organic substances derived from other organisms for their energy.

Key Takeaway:
Nutrition is the intake of energy sources (food) from the outside, whereas Respiration is the metabolic process of breaking down that food to release energy for life processes.

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