Biology 7 characteristics of life_NSS.ppt

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http//www.youtube.com/watch?vvM1a0Owu2k8
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The characteristics of living organisms
characteristics?
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The Seven Characteristics of living organisms

• All organisms show seven common characteristics
  at some stages in their life
• These characteristics are the life processes
• Non-living things only show some of them

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MRS GREN
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1. Movement

• Animals move from place to place with legs, wings
  or fins
• They need to search food, mates and escape from
  enemies
• Plants are anchored in the soil and they usually
  move by growing
• Comparatively slow

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2. Respiration

• Organisms break down food
• in their cells by a process called
  respiration to supply energy for movement, repair
  and growth
• Respiration
• Glucose oxygen ?carbon dioxide water
  energy
• It occurs in every cell in plants and animals

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3. Sensitivity (Irritability)

• Organisms have the ability to detect changes
  (stimulus) and respond to them
• Animals are more sensitive than plants
• Plants detect external stimuli such as light and
  water

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4. Growth
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(No Transcript)
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4. Growth

• Increase in size, weight and complexity
• Plants keep on growing throughout their lives
  while animals stop growing when they reach a
  certain size

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5. Reproduction

• Organisms produces offspring (new individual)
• Ensure the species does not die out (i.e. to
  prevent extinction)
• Sexual reproduction male female
• Asexual reproduction only 1 parent is needed

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6. Excretion

• Organisms remove the metabolic wastes (e.g.
  carbon dioxide, urea) produced from the chemical
  reactions inside their bodies
• Animals excrete the wastes in the form of expired
  air, sweat and urine
• Plants remove wastes by either turning them into
  harmless substances or removing them when leaves
  fall off

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7. Nutrition

• Organisms need food for energy, growth and repair
  and to maintain life
• Green plants have chlorophyll ? carry out
  photosynthesis
• Animals need to eat plants or other animals as
  they cannot synthesize food by themselves

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MRS GREN