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Prokaryotic Cells Vs. Eukaryotic Cells - PowerPoint PPT Presentation


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Prokaryotic Cells Vs. Eukaryotic Cells. Now that we have learned how living things are organized what’s next?. We will learn more about the lowest level of organization: cells What is the first thing that we need to know about cells?

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now that we have learned how living things are organized what s next
Now that we have learned how living things are organized what’s next?
  • We will learn more about the lowest level of organization: cells

What is the first thing that we need to know about cells?

  • All cells fall into one of the two major classifications of either prokaryotic or eukaryotic.
what s the difference between prokaryotes and eukaryotes
What’s the difference between prokaryotes and eukaryotes?
  • Prokaryotic cells were here first and for billions of years were the only form of life on Earth. All prokaryotic organisms are unicellular
  • Eukaryotic cells appeared on earth long after prokaryotic cells but they are much more advanced. Eukaryotic organisms unlike prokaryotic can be unicellular or multicellular.
slide7
Vibrio fischeri
  • Glow in the dark bacteria
  • Helps it survive in the ocean
  • Lives in fish and other marine life
let s take a look at the characteristics of prokaryotes
Let’s Take a Look at the Characteristics of Prokaryotes
  • Prokaryotes are the simplest type of cell.
  • Oldest type of cell appeared about four billion years ago.
  • Prokaryotes are the largest group of organisms
  • Prokaryotes unicellular organisms that are found in all environments.
let s take a look at the characteristics of prokaryotes1
Let’s Take a Look at the Characteristics of Prokaryotes
  • Prokaryotes do not have a nuclear membrane . Their circular shaped genetic material dispersed throughout cytoplasm.
  • Prokaryotes do not have membrane-bound organelles .
  • Prokaryotes have a simple internal structure.
  • Prokaryotes are smaller in size when compared to Eukaryotes.
shapes of prokaryotes
Shapes of Prokaryotes
  • Cocci = spherical (round)
  • Bacillus = (rod shaped)
  • Spirilla = helical (spiral)
now let s take a look at the characteristics of eukaryotes
Now let’s take a look at the characteristics of eukaryotes
  • Eukaryotic cells appeared approximately one billion years ago
  • Eukaryotes are generally more advanced than prokaryotes
  • Nuclear membrane surrounds linear genetic material (DNA)
is there more yes
Is there more? Yes!!!
  • Unlike prokaryotes, eukaryotes have several different parts.
  • Prokaryote’s organelles have coverings known as membranes.
  • Eukaryotes have a complex internal structure.
  • Eukaryotes are larger than prokaryotes in size .
what do eukaryotic cells look like
What do eukaryotic cells look like?

Mitochondria

Nucleus

Cytoplasm

Golgi Complex

Endoplasmic Reticulum

Cell Membrane

how do the differences line up
Prokaryotes

Organelles lack a membrane

Ribosomes are the only organelles

Genetic material floats in the cytoplasm (DNA and RNA)

Eukaryotes

Organelles covered by a membrane

Multiple organelles including ribosomes

Membrane covered Genetic material

How do the differences line up?
how do the differences line up1
Prokaryotes

Circular DNA

Unicellular

Cells are smaller in size

Has larger number of organisms

Eukaryotes

Linear DNA

May be multicellular or unicellular

Cells are larger in size

Has smaller number of organisms

How do the differences line up?
how do the differences line up2
Prokaryotes

Appeared 4 billion years ago

Eukaryotes

Appeared 1 billion years ago

How do the differences line up?
how do the similarities line up
How do the similarities line up?

Lets See!!!

Both types of cells have cell membranes (outer covering of the cell)

Both types of cells have ribosomes

Both types of cells have DNA

Both types of cells have a liquid environment known as the cytoplasm

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Your turn:
  • Make a Venn Diagram outlining the similarities and differences between prokaryotes and eukaryotes
  • You may use your book and/or consult your teammate