A+First+Look+at+Cells

A First Look at Cells ** Focus Questions **
 * How big are cells?


 * What do cells look like?


 * What are some similarities and differences between cells from different tissues / organisms?


 * How is the function of the tissue / organism related to the characteristics of the cells that make it up?

** Background ** From your reading about the Cell Theory, you know that all living things are made of cells. But what do cells look like? Are they all the same, or are there differences? In this activity you will examine cells from five different tissues / organisms. By analyzing the similarities and differences between them you will try to determine where they are from. You will examine slides of the following five tissues/organisms:
 * Onion root tip
 * Frog skin
 * Human cheek smear
 * Onion leaf
 * Bacteria

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