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5.L.1 Understand how structures and systems of organisms (to include the human body) perform functions necessary for life.
5.L.1.1 Explain why some organisms are capable of surviving as a single cell while others require many cells that are specialized to survive.
5.L.1.1
Students know that unicellular organisms consist of a single cell and perform all life processes within a single cell.
Students know that multicellular organisms are organisms that consist of more than one cell and have differentiated cells that perform specialized functions in the organism.
Students know that many organisms –including humans – are multicellular.
Students know that in complex multicellular organisms, only the surface cells that are in contact with the external environment are able to exchange substances with it.
Cells within the organism are too far away from the environment for direct exchange. This is the reason multicellular organisms have developed transport systems.
Vocabulary & Concepts
Unicellular organisms & examples
Multicellular organisms & examples
Life processes
Transport systems
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