Unicellular Vs. Multicellular Organisms

What is a unicellular organism?

• An organism that consists of many cells

• An organism that consists of only one cell

• An organism that can only be found in water

• An organism that changes its number of cells daily

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NGSS.MS-LS1-1

Which of the following is an example of a multicellular organism?

• Bacteria

• Amoeba

• Human

• Yeast

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NGSS.MS-LS1-1

What is the main advantage of being multicellular?

• Having a simpler structure

• Being able to live in extreme environments

• Having specialized cells that perform different functions

• Being smaller in size

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NGSS.MS-LS1-3

Which of the following is NOT a characteristic of unicellular organisms?

• They can perform all life processes within a single cell

• They are usually larger than multicellular organisms

• They reproduce quickly

• They can live in a variety of environments

How do unicellular organisms reproduce?

• By laying eggs

• By giving live birth

• By binary fission

• By pollination

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NGSS.MS-LS3-2

What is tissue?

• A group of unicellular organisms working together

• A single cell performing multiple functions

• A group of similar cells that perform a specific function

• A type of unicellular organism

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NGSS.MS-LS1-1

NGSS.MS-LS1-3

Which of the following best describes a multicellular organism's ability to survive damage to its body?

• It cannot survive any damage

• It can survive because it has only one cell

• It can often survive because it has many cells, some of which can take over the functions of damaged ones

• It always dies when one cell is damaged

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NGSS.MS-LS1-3

Why can multicellular organisms grow larger than unicellular organisms?

• They have more food

• They have more cells to make up their body

• They live longer

• They absorb more water

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NGSS.MS-LS1-3

What is one of the main reasons multicellular organisms can have complex body structures?

• They have only one type of cell

• They have cells that cannot move

• They have different types of cells that can form tissues and organs

• They are smaller than unicellular organisms

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NGSS.MS-LS1-3

Which of the following environments can unicellular organisms NOT be found in?

• Hot springs

• Deep oceans

• Inside other organisms

• None of the above