Bacteria and other microbes can be used to \"clean up\" an oil spill by breaking down oil into carbon dioxide and water. two samples isolated from the deepwater horizon leak in the gulf of mexico were labeled a and b. the dna of each was isolated and the percent thymine measured in each sample. assume the organisms contain normal double-stranded dna and predict the composition of the other bases.

Elephants in the savanna regions of africa dig holes in dried up river beds to reach water lying just below the surface. these holes provide drinking water for other animals as well. so, without the elephants, many animals might otherwise die from lack of water during the dry season. the location in which the elephants live is an example of a/n and the role they play in creating water holes is an example of a a) ecosystem; habitat b) community; niche c) habitat; niche d) niche; habitat