Research a desert ecosystem using key words such as desert, desert plants, and desert animals. Then, on a separate plece of paper, sketch a food web that might be in a desert ecosystem. You need not submit your drawing here. Revisit the graphic of a food web. Cfrom the lesson to
evaluate your desert food web.
Write a paragraph describing what a food chain and a paragraph describing what a food web might look like for a desert ecosystem. Then decide
whether you think a food chain or a food web is a more accurate representation of real world interactions and explain why.

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The dna in a cell’s nucleus encodes proteins that are eventually targeted to every membrane and compartment in the cell, as well as proteins that are targeted for secretion from the cell. for example, consider these two proteins: phosphofructokinase (pfk) is an enzyme that functions in the cytoplasm during glycolysis. insulin, a protein that regulates blood sugar levels, is secreted from specialized pancreatic cells. assume that you can track the cellular locations of these two proteins from the time that translation is complete until the proteins reach their final destinations. for each protein, identify its targeting pathway: the sequence of cellular locations in which the protein is found from when translation is complete until it reaches its final (functional) destination. (note that if an organelle is listed in a pathway, the location implied is inside the organelle, not in the membrane that surrounds the organelle.)

Explain the source of radioactivity in uranium in earth’s crust by which it produces nuclear radiation