3. What's the odd one out and why?

4. B1. Characteristics of living organisms
Lesson Objective:
1. List and describe the characteristics of living
organisms.

6. Characteristics of living organisms
- Respire
- Irritability (Sensitivity)
- Nourish
- Grow and develop
- Excrete
- Reproduce
RINGER

7. Respiration
- Organisms use oxygen and nutrients to release
energy
- Oxygen is generally gained from the
environment and taken in by gaseous
exchange systems

8. Irritability
• Organisms can detect changes to their
environment
• If conditions are extreme organisms will have
to move (or die)

9. Nutrition
• Organisms must take in food providing energy
or materials for growth
• Plants use photosynthesis to make their own
food

10. Growth
• Growth is a permanent increase in size and
dry mass
• Organisms generally grow as time goes on

11. Excretion
• Removal of toxic waste from organisms

12. Reproduction
• Sexual – fertilization to produce a new
organism
• Asexual – organism splits in two and produces
two identical organisms

13. Questions
1. When did the first living organism appear on
earth?
2. RINGER stands for what?
3. Give two reasons why reproduction is so
important for living organisms.