Cell: The Basic Unit of Life

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Cell The Basic Unit of Life

• Story Notes

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Introduction and What is A Cell?

• Everything is composed of living cells.
• Cells are chemical factories that use energy from
  food, take in raw materials, produce and exchange
  gases, grow, need water, eliminate waste
  materials, and reproduce themselves.

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Prokaryotic Cells

• Prokaryotic cells are those without a nucleus
  that live alone as single celled organisms.
• Bacteria are single celled organisms from the
  kingdom Monera.
• Bacteria are filled with cell liquid, cytoplasm,
  but dont have organized internal structures.
• Some bacteria get energy by producing their own
  food through photosynthesis.
• Others take and soak up chemicals from the
  environment.
• Prokaryotic cells have cytoplasm, cell membrane,
  cell wall (some), and ribosomes.

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A Cell With A Nucleus

• Eukaryotic cells have organized structures inside
  the cell including a cell nucleus which directs
  the activities of the cell.
• Organelles, the organized structures inside the
  cell, have specific jobs to perform.
• The structures inside are the nucleus,
  chloroplast, mitochondrion, cell wall (some),
  cytoplasm, cell membrane, endoplasmic reticulum,
  ribosomes, and vacuoles.
• Protista live in water but are more complex and
  bigger than bacteria.
• Plant, animals, and all other cells except
  bacteria are eukaryotic cells.

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Cells Invade the Land and Aquatic Life on Dry Land

• To keep cells alive, organisms that live out of
  water have ways to keep their cells wet.
• The cell wall helps to hold water inside the
  cell.
• The water supply is refreshed by drinking liquids
  and eating foods that contain water.
• Life can be considered aquatic because life
  happens in our cells. All cells are aquatic and
  are in constant contact with our blood.

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CELLS

• Prokaryotic Cells- cells without a nucleus that
  live as single celled organisms
• Bacteria are prokaryotic
• Eukaryotic Cells- have a nucleus and other
  organized structures
• Plants, animals, and all other cells besides
  bacteria are eukaryotic

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• All life is considered aquatic because life
  happens in cells and all cells need water to
  survive.

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Vocabulary

• Cytoplasm- liquid all cells are filled with
• Photosynthesis- process of producing own food
• Monera- bacteria are single celled organisms from
  this kingdom
• Protista- live in water, but are more complex and
  bigger than bacteria

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• Cell Wall- helps hold water inside the cell
• Nucleus- the brain of the cell
• Mitochondria- place where energy production occurs

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• The only parts that are in both prokaryotic and
  eukaryotic cells are cell membrane, cytoplasm,
  and ribosomes.