Atait exists in a population of a certain species. The trait has two variations, variation X and variation Y The percentage of the population that has each variation over several generations are shown in the table below.
Variation
Variation Y
Generation Generation Generation 10
50%
74%
50%
26%
8%
Which statement correctly describes how and why the occurrence of the variations of the trait changed over time?
OA Variation X became more common because it increases an individual's probability of surviving and reproducing
OB Variation Y became less common because it increases an individual's probability of surviving and reproducing
Oc Variation Y became more common because it decreases an individual's probability of surviving and reproducing
OD Variation X became less common because it decreases an individual's probability of surviving and reproducing
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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.)

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