Ascientist was testing an unknown chemical for the presence of various sugars and found that the only sugar present was the monosaccharide ribose. which of the following molecules is most likely the unknown chemical?

The answer is; Benedict’s reagent

It is used to test for reducing sugars. In presence of these sugars, the reagent, that is blue in color, turns different shaded of red (to brick red), depending on the amount of reducing sugars in the solution. It is important to note that the solution has to be heated.

1) gene flow

- it is described as the transfer of genes from one population to another population so that frequency of gene is increased.

-a zebra migrates to join a different herd of zebras.

2) natural selection

- a mechanism of evolutionary change in which individuals with advantageous traits survive and reproduce whereas the others ( those that can not adapt) eliminate from the population.

-competition for sunlight leads to taller trees.

3) mutation

- permanent change in the nucleotide sequence of dna ( genetic material) that could have harmful or useful consequences.

-the dna of a snake changes to make its venom stronger.

4) genetic drift - it is a random phenomenon ( that occurs by chance such as fire) that results in change in the gene frequency in a small population.    

-a grassfire randomly sweeps through a population of buffalo and kills most of the animals.

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