Embryonic stem cells are gathered from the inner cell mass of the blastocyst are called because they can develop into most but not all human cell types

because they are eaten by the frog and the frog getseaten by the snake and the snake by the eagle

affects the water bodies: excessive use of fertilizers causes eutrophication. the fertilizers which are used on plants affect the quality of land on which it is used, further causing erosion of soil. the fertilizers used on plants contain harmful chemical fumes which affect the environment.