Answer:
9 th qn answer us 4th option(D)
and 10 th qn answer is 3rd option (C)
True water from nature has no taste
<span>more expensive product</span>
<span>Antibodies. A. k.a. immunoglobulins. They are produced by a group of white blood cells called B lymphocytes (or B cells). There are 5 classes of immunoglobulins; IgM,IgA,IgE,IgG and IgD.The classes of antibody diifferent both in their constant region and in their activity.IgG, the most common antibody, and is found mostly in the blood and tissue fluids, and IgA is localized in the mucous membranes which line the respiratory and gastrointestinal tracts.</span>
They are reffered to as a silent mutation
