Download - L1 b1 biology gcse
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What's the odd one out and why?
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B1. Characteristics of living organisms
Lesson Objective:1. List and describe the characteristics of living organisms.
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Characteristics of living organisms
- Respire- Irritability (Sensitivity)- Nourish- Grow and develop- Excrete- Reproduce
RINGER
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Respiration
- Organisms use oxygen and nutrients to release energy
- Oxygen is generally gained from the environment and taken in by gaseous exchange systems
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Irritability
• Organisms can detect changes to their environment
• If conditions are extreme organisms will have to move (or die)
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Nutrition
• Organisms must take in food providing energy or materials for growth
• Plants use photosynthesis to make their own food
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Growth
• Growth is a permanent increase in size and dry mass
• Organisms generally grow as time goes on
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Excretion
• Removal of toxic waste from organisms
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Reproduction
• Sexual – fertilization to produce a new organism
• Asexual – organism splits in two and produces two identical organisms
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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.