Answer:
B. Antibodies react specifically with an antigen.
Explanation:
Serological tests are blood tests that look for antibodies in your blood. They can involve a number of laboratory techniques. Flucculation tests are based on the precipitation that takes place when antibody and specially prepared antigens are mixed together
Retina transmits images to the optic nerve
A snow gauge is a form of technology, similar to the rain gauge which measures rainfall, that could be used to <em>monitor </em><span><em>and measure the amount of solid precipitation</em></span><span><em> (snow) over a set period of time.
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<em />I hope this helped!! :D Have a blessed day!<em>
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