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Cell Theory and Prokaryote vs. Eukaryote

Cell Theory and Prokaryote vs. Eukaryote. What is a Cell?. Cell – Basic unit of living things. Organisms are either: Unicellular – made of one cell such as bacteria and amoebas . OR Multicellular – made of many cells such as plants and animals. Scientists to Remember.

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Cell Theory and Prokaryote vs. Eukaryote

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  1. Cell Theory and Prokaryote vs. Eukaryote

  2. What is a Cell? • Cell – Basic unit of living things. Organisms are either: • Unicellular – made of one cell such as bacteria and amoebas. OR • Multicellular – made of many cells such as plants and animals.

  3. Scientists to Remember • Robert Hooke (1665) – Observed “cells” in cork

  4. Cell Theory • Confirmed discoveries that all scientists believe to be true about cells: • 1. Cells are the basic unit of life. • 2. All living things are made of cells. • 3. New cells are produced from existing cells.

  5. before true nucleus nucleus The Discovery of Cells Prokaryotic Eukaryotic

  6. Eukaryotes • Has a nucleus with a nuclear envelope • Bigger and more complex than prokaryotes • Have membrane bound Organelles (golgi, ER, lysosomes…etc) • DNA – double-stranded and forms chromosomes (highly organized) • Can be uni- OR multicellular organisms • Ex: animals, plants, fungi

  7. Prokaryotes NO nucleus NO membrane bound organelles (just ribosomes) ALL are unicellular Smaller than eukaryotic cells Forerunner to eukaryotic cells (smaller and more simple) DNA – single strand and circular Ex: ALL Bacteria

  8. Similarities • Contain all four biomolecules(_ • Have ribosomes • Have DNA • Similar Metabolism • Can be unicellular • Have cell/plasma membranes or cell wall

  9. Eukaryote VS. Prokaryote Picture

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