The basic essential activities performed by an organism to withstand its life are called as life processes. These include nutrition, respiration, circulation, excretion and reproduction. Organisms obtain energy from food to perform these life processes which are essential for survival. These are also termed as maintenance processes.

Life processes refer to the various activities that living organisms perform to maintain their lives. These processes are essential for survival, growth, and reproduction. They include processes such as nutrition, respiration, circulation, excretion, and reproduction.

Nutrition

Nutrition is the process by which living organisms obtain food from their environment to provide energy and nutrients for growth and repair. It includes two types of nutrition - autotrophic and heterotrophic. Autotrophic nutrition involves the production of food by organisms using sunlight, carbon dioxide, and water. Heterotrophic nutrition involves the ingestion of food from other organisms.

Respiration

Respiration is the process by which living organisms obtain energy from food. It involves the breakdown of glucose molecules into carbon dioxide and water, which releases energy in the form of ATP. Respiration can be aerobic, which requires oxygen, or anaerobic, which does not require oxygen.

Circulation

Circulation is the process by which living organisms transport nutrients, oxygen, and waste products throughout their bodies. It includes the circulatory system, which is responsible for the transport of blood, and the lymphatic system, which is responsible for the transport of lymph.

Excretion

Excretion is the process by which living organisms remove waste products from their bodies. It includes the removal of carbon dioxide, water, and nitrogenous wastes such as urea.

Reproduction

Reproduction is the process by which living organisms produce offspring. It includes two types of reproduction - sexual and asexual. Sexual reproduction involves the fusion of gametes from two parents, while asexual reproduction involves the production of offspring from a single parent.

Conclusion

In conclusion, life processes are essential for the survival of living organisms. They include nutrition, respiration, circulation, excretion, and reproduction. Understanding these processes is crucial for understanding the biology of living organisms.