Given a scientific question and its correct answer, generate supporting facts for the answer. This supporting fact can be an explanation for the answer to the given question.

Question: Unlike wild animals, what type of species are genetically uniform, making them more vulnerable to die-out from disease? Answer: domestic species
Wild plants and animals maintain a valuable pool of genetic variation . This is important because domestic species are genetically uniform. This puts them at great risk of dying out due to disease.

Question: The hamstrings flex the leg, whereas the quadriceps femoris have what effect? Answer: extend
The hamstrings flex the leg, whereas the quadriceps femoris extend it.

Question: What is the skeleton of the cell? Answer: cytoskeleton
The cytoplasm consists of watery cytosol and cell structures. It has several functions. The cytoskeleton is the "skeleton" of the cell. It helps the cell keep its shape.