Searching for Clues in Cells

Students examine plant and animal cells to fi nd clues that might explain why plants can produce their own food, but animals cannot. They construct an input/output diagram to show what they understand about photosynthesis. Using PowerPoint images, drawings, and online interactive images, students identify major cell structures. They discover that plants have cell walls and chloroplasts, which are not found in animal cells. For classes with access to a compound microscope, students prepare and examine elodea cells and human cheek cells. Classes without microscopes use images from the PowerPoint, or obtain these images from suggested online sources.

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animal, cells, cell membrane, cell wall, chloroplasts, drawings, human, microscope, nucleus, photosynthesis, plant