Cell Theory - TCI Cells and Genetics Lesson 6

What does multicellular mean?

• One cell
• Nonliving
• Many cells
• Living

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Which best describes a difference between a unicellular organism and a multicellular organism?

• A unicellular organism is a plant and a multicellular organism is a human.
• A unicellular organism has one purpose- to survive.  A multicellular organism has many cells working together to keep the organism alive.
• A multicellular organism is simple and a unicellular organism is complex.
• A unicellular organism can only be found in certain biomes but a multicellular organism can be found anywhere on Earth.

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Which best explains how a single-celled organism can survive without other cells?

• They do not need any substance from outside of the cell.
• They are able to perform all necessary functions within one cell. 
• They do not need to perform more than one function to survive.
• They can't survive without other cells.

A single-cell organism can do everything a cell from a multicellular organism can do except

• reproduce
• specialize
• get rid of waste
• use energy

Fungi and bacteria are both single-celled organisms. What do they most likely have in common?

• Both fungi and bacteria are large organisms.
• Both fungi and bacteria can carry out all life functions in their one cell.
• Both fungi and bacteria need sunlight and nutrients from the soil to be able to grow.
• Both fungi and bacteria are highly specialized to do only one job so they must work with other cells to obtain food.

How are algae able to survive?

• The algae get energy from other algae.
• The algae do not require energy to survive.
• The single cell controls all the algae’s life processes.
• Other multi-celled organisms provide food for the algae. 

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Sue and Allie read about different kinds of organisms. They read about an organism with a respiratory system, digestive system, skeletal system, and muscular system. Which can Sue and Allie most likely conclude about this organism?

• The organism is unicellular.
• This organism is microscopic.
• The organism is multicellular.
• The organism does not have any cells.

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Molly is reading a book in science class. She reads one sentence that says, “This organism is capable of surviving as a single cell.” Which organism is she most likelyreading about?

• a mushroom
• a bacteria
• a flower
• a cricket

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Why do humans require many different types of cells to survive?

• Human cells are identical and work together to perform the same function.
• Human cells are specialized and work together to perform the same function.
• Human cells are identical and work independently to perform different functions.
• Human cells are specialized and work independently to perform different functions.

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What makes unicellular organisms unique and simple?

• They can do all life process as one cell.

• They can fly and eat at Zaxby’s.

• They can survive working with other single-celled organisms.

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