Cells and Human Body Systems

Basic unit of life

• Cell
• Tissue
• Organ
• Organ System

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Multicellular Organisms

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

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5. Based on this image is the Euglena multicellular or unicellular?

• 1. Multicellular
• 2. Unicellular

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Is composed of a single cell

• Unicellular

• Multicellular

• Both

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Which best describes the main job of most cells in multicellular organisms?

• Cells work to keep themselves alive.
• Cells work to keep the organism alive.
• Cells work to release needed materials.
• Cells work to store unneeded materials.

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Which organism performs all life processes in one cell?

• grass
• bacteria
• mushroom
• butterfly

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Molly is reading a book in science class. She reads one sentence that says, “This organism is capable of surviving as a single cell.” Which organism is she most likely reading about?

• amoeba
• flower
• mushroom
• insect

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Which best describes a multi-celled organism?

• basic
• simple
• uniform
• complex

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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 functions in only one cell.

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Fungi and bacteria are both single-celled organisms. What do they most likely have in common?

• Both fungi and bacteria are large organisms.
• Both fungi and bacteria can carry out all life functions in their one cell.
• Both fungi and bacteria need sunlight and nutrients from the soil to be able to grow.
• Both fungi and bacteria are highly specialized to do only one job so they must work with other cells to obtain food.