Answer: Adult stem cells are undifferentiated cells, found throughout the body after development, that multiply by cell division to replenish dying cells and regenerate damaged tissues. Also known as somatic stem cells, they can be found in juvenile, adult animals, and humans, unlike embryonic stem cells.
Answer:
a. Biomagnification
Explanation:
Biomagnification is the name given to the progressive accumulation of substances from one trophic level to another along a food chain. Thus, the substance will have its highest concentration in individuals who occupy trophic levels furthest from producers.
For biomagnification to occur, substances must be fat soluble (lipid soluble) and thus adhere to living tissues. Another feature of substances that undergo biomagnification is that they are generally not biodegradable or metabolized by the body.
The phenomenon is quite common with heavy metals (lead; mercury) and certain chlorinated and aromatic organic compounds with higher molecular mass, such as the insecticide DDT.
The prairie meadow mice are large eaters, eating their own weight in greens every twenty-four hours. Usually they eat tender stems, leaves, roots, tubers, flowers, seeds, fruits or grasses,The meadow mice helped by cutting down the grass and by loosening the soil with their tunnels.By making tunnels, the mice also continuously mix wastes and their food stores with the soil. In this way the nutrients from the food they eat are quickly returned to the soil.
