Explanation: There may be a fifth, but there is not enough energy to support any other levels.
Which is why there is effectively a limit to trophic levels.
Answer: In lab, we used Benedict's reagent to test for one particular reducing sugar: glucose. Benedict's reagent starts out aqua-blue. As it is heated in the presence of reducing sugars, it turns yellow to orange. The "hotter" the final color of the reagent, the higher the concentration of reducing sugar.
Photosynthesis<span> operates only in the presence of sunlight and uses the pigment Chlorophyll and enzyme systems of chloroplasts.</span>
18.69m = 61 feet 3.827 inches
i hope that helps!
I think that this is a true statement: it's better than determining the population size by indirect means, for example by judging how much food they ate or by judging by just a sample of the population. I would maybe add that this method can be supported by technology, for example taking a picture of the population and analyzing the picture later.
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