The rock pocket mouse is a small grey coloured mouse that lives in Mexico. These mice are the main food for owls. Rattlesnakes also feed on these mice. The mice get most of their food from grass plants. Scientists want to construct a pyramid of biomass for this food web. They first need to estimate how many organisms there are in the area. They decide to do this using sampling. * To estimate grass cover and the number of animals, they use a quadrat. Why do scientists use sampling when studying the organisms living in a habitat? Identify the limitations of this method and potential improvements that could be made to ensure that the estimated population size of plants and animals closely matches the actual value. – 7629