5.L.1.1 Single Cell/Multicell Study Guide

Which best describes a single-celled organism?

• an organism with one cell that uses other cells to survive

• an organism with many cells that work together to survive

• an organism with many cells that battle each other to survive

• an organism with one cell that performs all of its life processes

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Which is a characteristic of bacteria?

• large in size

• able to survive as a single cell

• found only in one particular environment

• made up of many different cells working together

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What is a difference between frogs and bacteria?

• Frogs are able to control all life processes in one cell, while bacteria cannot

• Frogs are single-celled organisms, while bacteria are multi-celled organisms

• Frogs are multi-celled organisms, while bacteria are single-celled organisms

• Frogs must rely on other single-celled organisms for survival, while bacteria are dependent only on themselves

Which best describes a difference between single-celled organisms and multicellular organisms?

• Single-celled organisms are simple, while multicellular organisms are complex

• Single-celled organisms have many functions, while multicellular organisms have one function

• Single-celled organisms can live without water, while multicellular organisms cannot live without water.

• Single-celled organisms can only be found in one specific environment, while multicellular organisms can be found anywhere on Earth.

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How are rabbits different from bacteria?

• Rabbits need only a single cell to complete all life functions while bacteria need multiple cells to survive

• Rabbits need multiple cells to complete all life functions while bacteria only need a single cell to survive

• Rabbits need multiple cells to complete all life functions while bacteria do not need any cells to survive

• Rabbits complete all life functions with one single cell while bacteria do not need any cells to survive

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Which best explains why humans are multicellular organisms?

• Human cells are too small to function alone

• Human cells join together to form one large cell

• Humans need many cells to carry out life processes

• Humans have many systems that perform the same functions

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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 organism shave one cell and are smaller that multicellular organisms

• Multicellular organisms have one cell and are larger than unicellular organisms

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How are single-celled organisms and multi-celled organisms similar?

• Both need food for energy and growth

• Both have a skeletal system for support

• Both require the interaction of many cells to survive

• Both are able to carry out all life processes in only one cell

Why does a human require specialized cells to live?

• Specialized cells allow humans to adapt to changes in their environment

• Human bodies have systems that require cells with different functions

• Specialized cells allow for life processes to occur in one cell

• Human bodies are simple and require few cells

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What is the main purpose of single-celled organisms?

• to survive

• to reproduce

• to produce food for other organisms

• to work with other single-celled organisms