Food Test 2: Protein - Biuret solution
Biuret solution is used to identify the presence of protein. Biuret reagent is a blue solution that, when it reacts with protein, will change color to pink-purple.
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If you observed a cell under a microscope and saw that it contained a plasma membrane, cell wall, and ribosomes, but no other organelles, what could you conclude?
If you observed a cell under a microscope and saw that it contained a plasma membrane, cell wall, and ribosomes, but no other organelles. I'd conclude that it is a prokaryotic cell. Prokaryotic cells are often called "before life" cells. They are basic and ancient, and are 200 times smaller than Eukaryotes. They do not contain a nucleus,nor cell bound membrane, but of the advantage is that they can reproduce quite easily.
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You would probably have to observe what your looking at. Look closely, do you see any cracks or crevices in the bones you are looking at? Do you see any indents or chipped pieces? Color, shape and size can also really help when observing a fossil. After close observation use resources and figure out what kind of fossil it is. Hope this helps!
The answer is 5 because you have to multiply the parenthesis by 6
Then you move the terms
Then you collect the terms
Then subtract the numbers
Last divide by both sides