Unicellular vs. Multicellular

Multicellular Organisms

• Made of 1 cell
• Made of more than 1 cell

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The majority of living organisms on Earth can be classified as _______.

• multicellular

• unicellular

• mammals

• insects

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Mr. Cooper is teaching his students about cells. He gives the following description of an organism:

This organism can only be seen through a microscope. In addition, it does not depend on other cells to survive. It can independently perform all of its major functions needed to survive.

Which best describes this organism?

• A. It is a single-celled organism.

• B. It is a multi-celled organism.

• C. It is a complex organism.

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Which is a characteristic of most single-celled organisms?

• They have a complex nervous system.

• They contain several different types of cells.

• They perform all life processes.

• They have a circulatory and a respiratory system.

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

• grasshopper
• bacteria
• pine needle
• mole

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Which organism performs all life processes in one cell?

• bacteria
• grass
• mushroom
• butterfly

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Which statement best describes a bacterial cell?

• It contains more than one cell.

• It is a complete organism.

• It is part of a larger organism.

• It contains different kinds of cells.

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Which statement describes the cellular make-up of a deer?

• A. Deer are made of one cell that carries out one life process.

• B. Deer are made of one cell that carries out all different life processes.

• C. Deer are made of many cells that are specialized to carry out different life processes.

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