Life processes are essential activities performed by living organisms to sustain life, including nutrition, respiration, transportation, excretion, growth, reproduction, and response to stimuli. Each of these processes plays a critical role in maintaining an organism's internal environment and supporting survival and adaptation. Understanding these life processes is vital for studying the functioning, adaptation, and evolution of living organisms.

1. LIFE PROCESSES
CLASS 10 BIOLOGY, CHAPTER 1

2. WHAT ARE LIFE PROCESSES?
• Life processes are essential activities performed by living organisms to maintain
life. These processes include nutrition, respiration, transportation, excretion,
growth, reproduction, and response to stimuli.

3. NUTRITION
• Nutrition is the process by which organisms obtain energy and nutrients from
food. It involves ingestion, digestion, absorption, and assimilation of food.

4. RESPIRATION
• Respiration is the process of releasing energy from food molecules. It occurs in all
living cells and involves the breakdown of glucose to release energy.

5. TRANSPORTATION
• Transportation is the movement of substances within an organism. It includes the
transport of nutrients, gases, and waste products throughout the body.

6. EXCRETION
• Excretion is the removal of waste products from the body. It helps maintain the
body's internal environment by eliminating harmful metabolic wastes.

7. GROWTH
• Growth is the increase in size or number of cells in an organism. It occurs through
cell division and enlargement.

8. REPRODUCTION
• Reproduction is the process by which organisms produce offspring. It ensures the
continuation of the species and involves the formation of new individuals.

9. RESPONSE TO STIMULI
• Living organisms respond to external stimuli to survive and adapt to their
environment. Responses can be chemical, physiological, or behavioral.

10. CONCLUSION
• Understanding life processes is crucial for understanding the functioning of living
organisms. It helps in studying the adaptation, survival, and evolution of life
forms.