Life Processes
Life processes are the activities that living organisms carry out to maintain their lives. These processes are essential for the survival of the organism and include activities such as nutrition, respiration, excretion, transportation, and reproduction.
Nutrition
- Definition: Nutrition is the process by which organisms obtain and utilize nutrients for energy, growth, and repair.
- Types of Nutrition:
- Autotrophic Nutrition: Organisms that can produce their own food through photosynthesis or chemosynthesis.
- Heterotrophic Nutrition: Organisms that obtain food by consuming other organisms.
Respiration
- Definition: Respiration is the process by which cells obtain energy from nutrients.
- Types of Respiration:
- Aerobic Respiration: Occurs in the presence of oxygen and yields a large amount of energy.
- Anaerobic Respiration: Occurs in the absence of oxygen and yields a small amount of energy.
Excretion
- Definition: Excretion is the process of eliminating metabolic waste products from the body.
- Types of Excretion:
Transportation
- Definition: Transportation is the movement of substances within an organism.
- Types of Transportation:
Reproduction
- Definition: Reproduction is the process by which organisms produce offspring.
- Types of Reproduction:
- Asexual Reproduction: Involves only one parent and produces genetically identical offspring.
- Sexual Reproduction: Involves two parents and produces genetically diverse offspring.
Study Guide
- Explain the difference between autotrophic and heterotrophic nutrition.
- Describe the process of aerobic respiration and its importance in providing energy to cells.
- Compare and contrast the three types of excretion: ammonotelism, ureotelism, and uricotelism.
- Discuss the significance of transportation in maintaining the life processes of organisms.
- Explain the advantages and disadvantages of asexual and sexual reproduction.
