Chapter 7 Cell Structure and Function

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Presentation transcript:

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

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

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

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

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

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

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.

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

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

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