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He La cells have play important role in the study of cancer and even in cancer therapies. He La cells are also used to diagnose trisomic disorders such as Down's Syndrome with the help of chromosome banding. Some genes present in the He La cells are used as markers and compared with the other cell line in question. Presence of the marker for Down's syndrome in the cell in question shows that the person is suffering from the disease.
Moist ground and or eathquakes
Answer:
Thickness of the skin and hair on the body
Explanation:
Thickness of the skin and hair on the body are the characteristics of animals that help them to survive the temperatures of their environments. If the animal is herbivore so they feed on plants while if the animal carnivore it feed on flesh. Yes, they have characteristics such as long legs and powerful nose etc that help them find and capture food. Yes, the animals have ways to sustain themselves if the availability of food or water is limited such as camel. Different natural defenses used by these animals against predators such as Camouflage. Yes, they have characteristics to protect their young such as horns used by deer and buffalo.
Answer:
Extrinsic regulatory mechanisms are external and depend on the firing of some factor outside the population itself. Among them are interspecific competition, food and space restrictions, very strong climatic variations, weathering and inharmonious relationships with other populations (parasitism and predatism).
Good examples of interspecific competition appear when rabbits, caves, rats compete for the same plant, or different fish and birds, such as the heron, vie for the same species of smaller fish. This is because these different species keep their populations in the same ecological niche. Competition is often so strong that some species eventually, as one example of an extrinsic homeostatic mechanism overriding an intrinsic homeostatic process is their disappearance or migration to other regions.
In this competition, the presence of adaptations among individuals in the population that promote better food search, speed, vision, and others can make the difference between elimination and survival.
