Question

To remove harmful by-products of cellular reactions the life process is

• A. Excretion
• B. Nutrition
• C. Respiration
• D. Growth

Answer 1

The correct option is A

Excretion

The correct answer is A.

Explanation of the correct option:

1. The processes needed to sustain life are nutrition, respiration, growth, transportation and excretion.
2. The process that removes waste materials from the body is called excretion.
3. It is generated by the cellular reactions of the body.

Explanation of the incorrect options:

Option B:

1. The process that provides energy and nutrients to the body is called nutrition.
2. There are two modes of nutrition: heterotrophic and autotrophic.

Option C:

1. Respiration is an oxidation reaction that breaks complex substances into simpler compounds to liberate energy is called respiration.
2. The respiration can be aerobic and anaerobic.

Option D:

1. The process that adds weight and increases the size of an individual is called growth.
2. It also leads to an increase in cell size.

Excretion is the process by which harmful products are removed from the body.