In this lesson, you will learn about:

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In this lesson, you will learn about

• The five kingdoms of organisms
• Prokaryota
• Protoctista
• Fungi
• Plantae
• Animalia

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Kingdom Prokaryota
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Kingdom Prokaryota

• The kingdom of bacteria (singular bacterium)
• Bacteria are the simplest kind of organisms in
  terms of their cell structure and body
  organization
• Microscopic organisms

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Features of Prokaryotes

• They are unicellular organisms
• They lack distinct nucleus (plural nuclei) and
  organelles
• They usually have a cell wall surrounding each
  cell

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Features of Prokaryotes

• They are unicellular organisms
• They lack distinct nucleus (plural nuclei) and
  organelles
• They usually have a cell wall surrounding each
  cell
• They often reproduce by binary fission

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Features of Prokaryotes

• They are unicellular organisms
• They lack distinct nucleus (plural nuclei) and
  organelles
• They usually have a cell wall surrounding each
  cell
• They often reproduce by binary fission
• Most bacteria need to take in food, but some can
  make their own by photosynthesis

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3 Common Shapes of Bacteria

• Cocci/Spherical

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Streptococci
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3 Common Shapes of Bacteria

• Cocci/Spherical
• Bacilli/Rod-shaped

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E. Coli -Commonly found
inside the human colon
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3 Common Shapes of Bacteria

• Cocci/Spherical
• Bacilli/Rod-shaped
• Spirilli/Spiral

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Leptospira
Helicobacter Pylori
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Prokaryotes

• Bacteria are abundant everywhere water, air,
  soil, even plant and animal bodies
• Most bacteria are saprophytic they break down
  dead organisms, causing decay and releasing
  nutrients back into the environment
• Most are also parasitic they live in, with, or
  on another organism for benefits such as nutrients

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Prokaryotes

• Some bacteria can survive in extreme conditions
  where nothing else can live

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Prokaryotes

• Bacteria multiply very quickly. Under suitable
  conditions, each bacterium can divide into two
  bacteria in every 20 minutes by cell division.
  If 100 bacteria have entered your body, how many
  bacteria will be formed after 2 hours?
• 6400 bacteria!!!