In order to appreciate the importance of the cell membrane, compare a cell membrane to a window screen. Both the cell membrane and a window screen allow certain things to pass through it, but keeps other things out. What are some things that can pass through a window screen? What are some things that cannot pass through a window screen? Why is it important to keep these things from moving through the screen?

identify the dna change shown in the diagram and explain how that change can result in the increased genetic diversity often seen among siblings.identify the dna change shown in the diagram and explain how that change can result in the increased genetic diversity often seen among siblings.v

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answer: collecting information/data

reason: the student is going around and asking people questions to collect data

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wegner's theory did not explain how the continents could move

explanation: