Unit 2 Part 1 test
November 18 – Gold
November 19 - Purple
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Ability to move
Ability to grow
Ability to respond to stimuli
Ability to reproduce
Able to use energy
Made up of cells
Different levels of organization
• All living things are made up of cells
• Cells are the basic unit of structure and
function in living things.
• Living cells come only from other living cells.
Scientist
What they did for the cell theory
Robert Hooke
Discovered honeycomb like structures in
cork slice, saw cell wall. Coined the term
“cell”
Anton van Leeuwenhoek
Discovered protozoa and bacteria after
examining pond water
Robert Brown
Discovered nucleus in plant cells
Theodor Schwann
Concluded all living things are made of
cells both plant and animal
Rudolf Virchow
Added third part to cell theory “cells
develop only from existing cells”
• Unicellular
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Amoeba
Euglena
Paramecium
Bacteria
• Multicellular
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Hydra
Rotifer
Daphnia
Water Bear
Pollen and Petal
Leaf, Stem, Root Cell
Bone and Muscle Cell
Skin and Brain Cell
• Prokaryotic
– Does not contain a
nucleus
– Smaller
• Eukaryotic
– Does contain a nucleus
– larger
• Cells have specialized functions
• Bone cells are specific to the bone, muscle
cells are specific to muscles.
1. Carbon
2. Hydrogen
3. Oxygen
• Cells are much larger than atoms
• Not all cells are microscopic.
– Pollen and Petal
– Leaf, Stem, Root Cell
– Brain and Muscle Cell
– Skin and Bone Cell