B. because they are not manufactured by the body
Answer:
The children can have all of the following, AB, A and B.
Explanation:
Within a Punnett square, BO and AB can only make AB, Ao, BB and BO.
Answer:
A feedback loop is a biological occurrence where the output of a system amplifies the system (positive feedback) or inhibits the system (negative feedback).
Explanation:
Example, during blood clotting, a cascade of enzymic proteins acitvates each other, leading to the formation of fibrin clot that prevents further blood loss.
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