B. The water is likely contaminated with high levels of pollution or waste
<span>James Hutton developed the concept of erosion and deposition.</span>
Answer:
Basically, the Atrioventricular valves are Mitral and Tricuspid valves located between the atrium and ventricles. Their main functions is to “prevent the backflow of blood from the ventricles into the atrium during the ventricular contraction (systole).
Explanation:
Therapeutic cloning<span>generates personalized ES cells
o Uses the technique of nuclear transplantation to produce cultured ES cells
o The cell that has received the transplanted nucleus is allowed to undergo the earliest steps of development giving rise to a very early embryo consisting of about 200 cells
• Not transferred into the uterus of a foster mother but used as a source from which ES cells are derived
o Cells obtained are genetically identical to the original donor
• Can be grafted back into the adult from whom the donor tissue was taken without fear of immunological rejection</span>