Levels of Organization

What are the differences between a UNICELLULAR ORGANISM and a MULTICELLULAR ORGANISM?

• Unicellular organisms do not have DNA

• Multicellular organisms have cell walls

• Unicellular organisms are only one celled

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Which level of organization shows all of the characteristics of life?

• molecule

• cell

• atom

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What does specialization mean?

• Each cell in the human body has the same job

• Some human cells have a membrane but others do not

• Cells have different sizes and shapes because they do different jobs

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NYS EXAM PRACTICE

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The picture shows four types of tissues in the body. By looking at the picture, a tissue is:

• Similar cells that work in groups

• Cells that work alone

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These show two systems in the human body. A system is made when:

• Many organs work together

• Many cells work together

• Many tissues work together

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