Unit 3.1 Introduction to Cells Review

Mathematical Equivalence

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Which of the following is the smallest functional unit in both a bacterium and a mammal? (a)  

• organelle
• organ
• cell
• tissue

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• All cells are microscopic in size.

• All cells come from a preexisting cell.

• Cells are only found as oval or round in shape.

• Only unicellular organisms are composed of cells.

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• All cells come from pre–existing cells.

• All organisms are composed of cells.

• Cells are the basic unit of life.

• Cells contain genetic material.

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Which of the following best describes how cells are grouped in most animals? (a)  

• Cells are grouped by color.
• Cells are grouped by energy needs.
• Cells are grouped by size.
• Cells are grouped by function.

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Which statement is true of a multicellular organism?

• Each cell in a multicellular organism performs all special functions.

• All cells in a multicellular organism perform the same special functions.

• Different types of cells in a multicellular organism perform special functions.

• Different organelles of a multicellular organism’s cells perform all special function

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Over 1.5 million different species have been discovered on Earth, and scientists discover about 15,000 new species each year. These species are very different, ranging from bacteria and algae to whales and redwood trees. Which of the following is NOT a characteristic that all these species have in common?

• All species reproduce.

• All species have metabolic functions.

• All species are composed of cells.

• All species have cell walls.

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• Both contain many artificial structures.

• Both make their own energy from sunlight.

• Both have the cell as their most basic unit of structure.

• Both attain new cells through the nutrient-rich food they eat.

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Why are microscopes important when studying most cells? (a)  

• Most cells are very large.
• Most cells are very small.  
• Most cells move very quickly.
• Most cells are dead.  

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This is the most basic unit of life

• atom
• cell
• nucleus
• DNA

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