Life Processes

Life processes are the essential activities that all living organisms carry out to maintain their existence.

1. Nutrition:
   • Ingestion, digestion, absorption, and assimilation of food
   • Plants obtain nutrients through photosynthesis
   • Animals consume organic matter for nutrients
2. Respiration:
   • Exchange of gases with the environment
   • Cellular respiration produces ATP for energy
3. Excretion:
   • Removal of waste products from metabolic activities
   • Elimination of harmful substances such as urea and carbon dioxide
4. Sensitivity:
   • Ability to detect and respond to changes in the environment
   • Response to stimuli such as light, temperature, and touch
5. Movement:
   • Ability to change position or location
   • Animals have the ability to move independently
   • Plants exhibit movements such as phototropism and thigmotropism
6. Reproduction:
   • Process of producing new individuals of the same species
   • Can occur through sexual or asexual means
7. Growth:
   • Increase in size or number of cells in an organism
   • Essential for development and repair

Study Guide

Nutrition

• Understand the different modes of nutrition (autotrophic and heterotrophic).
• Learn about the process of photosynthesis in plants and the various components involved.
• Explore the digestive system in animals and the role of enzymes in digestion.

Respiration

• Study the structure and function of the respiratory system.
• Learn about the process of aerobic and anaerobic respiration in cells.
• Understand the role of oxygen and carbon dioxide in respiration.

Excretion

• Explore the excretory organs and their functions in different organisms.
• Learn about the importance of maintaining a balance of water and salts in the body.

Sensitivity

• Understand the different types of stimuli and the receptors responsible for detecting them.
• Explore the nervous system and its role in transmitting signals for response.

Movement

• Study the types of movements exhibited by organisms, including locomotion and tropisms in plants.
• Explore the muscular and skeletal systems in animals and their role in movement.

Reproduction

• Understand the processes of sexual and asexual reproduction.
• Learn about the reproductive organs and their functions in different organisms.

Growth

• Study the process of cell division and its role in growth.
• Explore the factors that influence growth in organisms, including genetics and environmental factors.