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Chapter 7 Cell Structure and Function

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Presentation on theme: "Chapter 7 Cell Structure and Function"— Presentation transcript:

1 Chapter 7 Cell Structure and Function
Section 7.1- Life is Cellular Objectives: Explain what the cell theory is Describe how researchers explore the living cells Distinguish between eukaryotes and prokaryotes

2 Vocabulary cell: collection of living matter enclosed by a barrier that separates the cell from its surroundings; basic unit of all forms of life cell theory: idea that all living things are composed of cells, cells are the basic units of structure and function in living things, and new cells are produced from existing cells

3 Vocabulary nucleus: the center of the atom which contains the protons and neutrons; in cells, structure that contains the cell’s genetic material (DNA) and controls the cell’s activity. eukaryote: organism whose cells contain nuclei prokaryote: unicellular organism lacking a nucleus

4 Section 7.1- Life is Cellular
Discovery of Cells Robert Hooke Used light microscope to look at cork cells Cells reminded him of monk cubicles “many little boxes” Called them CELLS

5 Section 7.1- Life is Cellular
Discovery of Cells Anton van Leewenhoek First to observe living cells Invented simple, tiny microscopes

6 Section 7.1- Life is Cellular
The cell theory states that: all living things are composed of one or more cells cells are the basic units of structure and function in an organism cells come only from the reproduction of existing cells

7 Section 7.1- Life is Cellular
Cellular Basis of Life All living things are made of organized parts obtain energy from their surroundings perform chemical reactions change with time respond to their environment reproduce.

8 Section 7.1- Life is Cellular
Prokaryotes Prokaryote cells lack a nucleus and membrane-bound organelles. Have genetic material not contained in a nucleus

9 Section 7.1- Life is Cellular
Eukaryotes Eukaryote cells have a nucleus and membrane-bound organelles

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