Single Cell Organisms

Which of these is a single celled organism?

• Eugene
• Paranoid
• Amoeba
• Cillia

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NGSS.MS-LS1-1

Unicellular means...

• having one cell
• having more than once cell
• riding a unicycle
• having less than one cell

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NGSS.MS-LS1-1

What is the purpose of flagella?

• Movement
• Snails
• Protection
• There is no function

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NGSS.MS-LS1-2

Every plant and animal starts out as a single cell. This one cell divides and multiples to form a more complex multicellular organism.

• true
• false

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NGSS.MS-LS1-1

Which of the following is NOT a cell structure used for locomotion by unicellular organisms?

• cell wall
• pseudopod
• flagellum
• cilium

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

• They do not need to perform more than one function to survive.
• They are able to perform all necessary functions within one cell.
• They do not need any substance from outside of the cell.

Which best describes a single-celled organism?

• a small group of organisms
• an organism that is able to carry out all its life processes
• a small organism with a variety of parts
• an organism that relies on other organisms to survive

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NGSS.MS-LS1-1

Logan is comparing the characteristics of different types of organisms. Which best describes a difference between insects and bacteria?

• Insects are made of one cell, while bacteria are made of many cells.
• Insects require energy to perform life functions while bacteria do not.
• Bacteria are made of one cell, while insects are made of many cells.
• Bacteria require energy to perform life functions while insects do not.

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NGSS.MS-LS1-1

Which organism is best classified as a single-celled organism?

• grasshopper
• bacteria
• pine needle
• mole

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NGSS.MS-LS1-1

How are multicellular and unicellular organisms different?

• Multicellular organisms have more than one cell and are smaller than unicellular organisms.
• Unicellular organisms have more than one cell and are larger than multicellular organisms.
• Unicellular organisms have one cell and are smaller than multicellular organisms.
• Multicellular organisms have one cell and are larger than unicellular organisms.

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NGSS.MS-LS1-1