To return to the chapter summary click Escape or close this document. Chapter Resources Click on one of the following icons to go to that resource. life.msscience.com Image Bank Foldables Video Clips and Animations Standardized Test Practice Chapter Review Questions Chapter Summary

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To return to the chapter summary click Escape or close this document. Click on individual thumbnail images to view larger versions. Image Bank

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To return to the chapter summary click Escape or close this document. Image Bank Comparing Cells

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To return to the chapter summary click Escape or close this document. Foldables Cells Make the following Foldable to help you illustrate the main parts of cells.

To return to the chapter summary click Escape or close this document. Foldables Fold a vertical sheet of paper in half from top to bottom.

To return to the chapter summary click Escape or close this document. Foldables Fold in half from side to side with the fold at the top.

To return to the chapter summary click Escape or close this document. Foldables Unfold the paper once. Cut only the fold of the top flap to make two tabs.

To return to the chapter summary click Escape or close this document. Foldables Turn the paper vertically and write on the front tabs as shown.

To return to the chapter summary click Escape or close this document. Foldables As you read the chapter, draw and identify the parts of plant and animal cells under the appropriate tab. Illustrate and Label

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To return to the chapter summary click Escape or close this document. 1 1 Prokaryotic and eukaryotic are the two cell types. Cell Structure The DNA in the nucleus controls cell functions. Reviewing Main Ideas Organelles such as mitochondria and chloroplasts process energy. Most many-celled organisms are organized into tissues, organs, and organ systems.

To return to the chapter summary click Escape or close this document. 2 2 A simple microscope has just one lens. A compound light microscope has an eyepiece and objective lenses. Viewing Cells To calculate the magnification of a microscope, multiply the power of the eyepiece by the power of the objective lens. Reviewing Main Ideas According to the cell theory, the cell is the basic unit of life. Organisms are made of one or more cells, and all cells come from other cells.

To return to the chapter summary click Escape or close this document. 3 3 A virus is a structure containing hereditary material surrounded by a protein coating. Viruses A virus can make copies of itself only when it is inside a living host cell. Reviewing Main Ideas

To return to the chapter summary click Escape or close this document. Chapter Review Question 1 Which is a typical animal cell?

To return to the chapter summary click Escape or close this document. Chapter Review The answer is A. Typical animal cells do not have cell walls or chloroplasts. Answer

To return to the chapter summary click Escape or close this document. Question 2 Which plant cell organelle contains a green pigment that captures the light energy used to make glucose? A. central vacuole B. chloroplast C. mitochondrion D. nucleus Chapter Review

To return to the chapter summary click Escape or close this document. Answer The answer is B. Chloroplasts are essential to the process of photosynthesis. Chapter Review

To return to the chapter summary click Escape or close this document. Question 3 Who discovered cells? A. Matthias Schleiden B. Robert Hooke C. Rudolf Virchow D. Theodor Schwann Chapter Review

To return to the chapter summary click Escape or close this document. Answer The answer is B. In 1665, Robert Hooke looked at a slice of cork under his microscope and named the box-like structures he observed cells. Chapter Review

To return to the chapter summary click Escape or close this document. Question 4 Rudolf Virchow hypothesized that _______. A. All animals are made of cells. B. All plants are made of cells. C. Every cell came from a cell that already existed. D. The cell is the basic unit of organization in organisms. Chapter Review

To return to the chapter summary click Escape or close this document. Answer The answer is C. Virchow concluded that cells divide to form new cells. Chapter Review

To return to the chapter summary click Escape or close this document. Chapter Review Question 5 Answer Viruses that infect bacteria are called _______. The answer is bacteriophages. Bacteriophages attach to a bacterium and inject their hereditary material.

To return to the chapter summary click Escape or close this document. Standardized Test Practice Question 1 Which part of the cell regulates the interactions between the cell and the environment? A. cell wall B. cell membrane C. nucleus D. ribosomes

To return to the chapter summary click Escape or close this document. Standardized Test Practice Answer The answer is B. All cells have a cell membrane.

To return to the chapter summary click Escape or close this document. Standardized Test Practice Question 2 Which is the function of the flagellum? A. excretes wastes B. provides movement C. provides protection D. provides no function

To return to the chapter summary click Escape or close this document. Standardized Test Practice Answer The answer is B. The flagellum is a whip-like structure that provides movement for the cell.

To return to the chapter summary click Escape or close this document. Standardized Test Practice Question 3 What is the function of this organelle?

To return to the chapter summary click Escape or close this document. Standardized Test Practice A. captures light energy that is used to make glucose B. directs all activities of the cell C. release energy that is needed by the cell from food D. sort proteins and other cellular substances and package them into membrane-bound structures

To return to the chapter summary click Escape or close this document. Standardized Test Practice Answer The answer is D. These stacked flattened membranes are called Golgi bodies.

To return to the chapter summary click Escape or close this document. Standardized Test Practice Question 4 Which microscope uses a magnetic field in a vacuum to direct beams of electrons? A. compound B. electron C. fluorescence D. simple

To return to the chapter summary click Escape or close this document. Standardized Test Practice Answer The answer is B. Electron microscope images must be photographed or electronically produced.

To return to the chapter summary click Escape or close this document. Standardized Test Practice Question 5 Which helps stop viral infections? A. antibiotics B. bacteriophages C. interferons D. mitochondrion

To return to the chapter summary click Escape or close this document. Standardized Test Practice Answer The answer is C. Interferons are proteins that are produced rapidly by virus-infected cells and move to noninfected cells in the host.

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