Answer:
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The identity of the "unknown element", "Y", is magnesium (Mg).
The substance that bind to specific antigens on pathogens causing them to clump together is option A which is antibodies and this is to fight against the pathogens and render them inactive in the human bodies
<h3>What is antibodies?</h3>
Antibodies are proteins or substances that is secreted by organs in the body or hormones which help to fight against foreign substances that invades the body or fight against pathogens that might want to cause diseases or inflammation in the body.
Therefore, The substance that bind to specific antigens on pathogens causing them to clump together is option A which is antibodies and this is to fight against the pathogens and render them inactive in the human bodies
Learn more about antibodies below.
brainly.com/question/905225
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The tidal volume (TV) will be decreased greatly and it will be reduced to more than half of normal. In the event of complete obstruction of the right main bronchus; the whole right lung becomes a dead space wherein the right lung will not be ventilated. Ventilation is the exchange of gases between the atmosphere and the alveolus (which is primary site of gas exchange).
C)Human activity
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