The hormone that's causing Marisol to overeat is INSULIN.
Marisol is suffering from diabetes. In diabetes the insulin production is very little or non existing. Since the insulin allows the glucose to enter the cells, and in diabetes this hormone practically doesn't exist, the glucose will accumulate in the blood, causing hyperglycemia, and she will be hungry because the cells don't have energy (glucose) entering.
The right answer to this question is option C. the traits acted upon natural selection were genes.
At the time Charles Darwin developed the evolution theory, there wasn't a single study about genes in all science scenery, that could be explained by the lack of technology to study them and even to know they existed in the first place.
So, his theory was basically talking about adaptation, if an organism can't survive a specific environment, he'll probably die until another generation comes in and this one can survive in this environment, passing their genes to the next ones. The lack of information was the knowledge about the genes we have today, that's why most scientists take only the new Darwin theory, that includes the study of genes.
Genetic selection is the process by which certain traits become more prevalent in a species than other traits. These traits seen in organism are due to the genes found on their chromosomes. Figure 1 allies 4 genes are inherited income in various forms. Genes have more than one version or allele.
Photosynthesis is the process by which plants and other things make food. It is a chemical process that uses sunlight to turn carbon dioxide into sugars that the cell can use as energy. As well as plants, many kinds of algae, protists, and bacteria use it to get food.
Hope this helps (:
