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L1 b1 biology gcse
 

L1 b1 biology gcse

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    L1 b1 biology gcse L1 b1 biology gcse Presentation Transcript

    • Whats the odd one out and why?
    • B1. Characteristics of living organismsLesson Objective:1. List and describe the characteristics of livingorganisms.
    • Characteristics of living organisms- Respire- Irritability (Sensitivity)- Nourish- Grow and develop- Excrete- Reproduce RINGER
    • Respiration- Organisms use oxygen and nutrients to release energy- Oxygen is generally gained from the environment and taken in by gaseous exchange systems
    • Irritability• Organisms can detect changes to their environment• If conditions are extreme organisms will have to move (or die)
    • Nutrition• Organisms must take in food providing energy or materials for growth• Plants use photosynthesis to make their own food
    • Growth• Growth is a permanent increase in size and dry mass• Organisms generally grow as time goes on
    • Excretion• Removal of toxic waste from organisms
    • Reproduction• Sexual – fertilization to produce a new organism• Asexual – organism splits in two and produces two identical organisms
    • Questions1. 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.