The Cell. The cell is the basic unit of living things Microscopes allow us to see inside the cell. 15.2

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1 The Cell NEW the BIG idea All living things are made up of cells The cell is the basic unit of living things Microscopes allow us to see inside the cell Different cells perform various functions. OUTLINE

2 15.1 The cell is the basic unit of living things. All living things are made up of one or more cells. Organisms share the following characteristics: organization ability to grow and develop ability to respond ability to reproduce organism unicellular multicellular microscope bacteria Multicellular organisms include this frog and these water-lily plants. Many unicellular organisms live in pond water. SECTION OUTLINE

3 15.2 Microscopes allow us to see inside the cell. A prokaryotic cell is relatively simple in structure, with no nucleus or other organelles. cell membrane cytoplasm nucleus eukaryotic cell prokaryotic cell organelle cell wall SIMULATION View cells through different types of microscopes. A bacterium consists of a single prokaryotic cell. chloroplast mitochondria SECTION OUTLINE

4 15.2 Microscopes allow us to see inside the cell. A prokaryotic cell is relatively simple in structure, with no nucleus or other organelles. A eukaryotic cell is more complex, with many different organelles inside it. cell membrane cytoplasm nucleus eukaryotic cell prokaryotic cell organelle cell wall chloroplast mitochondria plant cell animal cell Plants and animals are made up of many eukaryotic cells. SECTION OUTLINE

5 15.2 Microscopes allow us to see inside the cell. A prokaryotic cell is relatively simple in structure, with no nucleus or other organelles. A eukaryotic cell is more complex, with many different organelles inside it. cell membrane cytoplasm nucleus eukaryotic cell prokaryotic cell SIMULATION Take a virtual tour of a cell. organelle cell wall chloroplast mitochondria Plants and animals are made up of many eukaryotic cells. SECTION OUTLINE

6 15.3 Different cells perform various functions. The single cell of a unicellular organism does all that is necessary for the organism to survive. A multicellular organism is a community of specialized cells. Scientific models make it easier to understand cells. specialization tissue organ archaea The tarsier has many levels of organization in its body. SECTION OUTLINE

7 15.1 The cell is the basic unit of living things. I. The cell is the basic unit of living things. A. Living things are different from nonliving things. 1. Characteristics of Life 2. Needs of Life B. All living things are made of cells. C. The microscope led to the discovery of cells. D. Cells come from other cells. E. The cell theory is important to the study of biology. 1. Louis Pasteur 2. Bacteria and Spontaneous Generation organism unicellular multicellular microscope bacteria SUMMARY

8 15.2 Microscopes allow us to see inside the cell. II. Microscopes allow us to see inside the cell. A. The microscope is an important tool. B. Cells are diverse. C. Plants and animals have eukaryotic cells. 1. Structures That Process Information 2. Organelles That Provide Energy 3. Organelles That Process and Transport 4. Organelles for Storage, Recycling, and Waste cell membrane cytoplasm nucleus eukaryotic cell prokaryotic cell organelle cell wall chloroplast mitochondria SUMMARY

9 15.3 Different cells perform various functions. III. Different cells perform various functions. A. Organisms can be classified by their cell type. 1. Archaea and Bacteria 2. Eukarya specialization tissue organ B. Cells in multicellular organisms specialize. C. A multicellular organism is a community of cells. D. Scientists use models to study cells. SUMMARY

10 Chapter Resources Image Gallery Click here to view chapter images and animations Click on the items below to access resources on CLASSZONE.COM Resource Centers Get more information on select science topics Math Tutorial Review math concepts Content Review Review key concepts and vocabulary Standardized Test Practice Practice state standardized tests BACK TO

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