D. Pathogens can be found in saliva and mucus drops from sneezes
Answer:
Options B and D
Explanation:
In animals, gaseous exchange takes place in the alveoli in the lungs. Generally, animals breath-out (exhale) carbon dioxide and breath-in (inhale) oxygen. Thus, carbon moves from the blood in the form of carbon dioxide into the alveoli in the lungs while the oxygen inhaled moves from the alveoli in the lungs to the blood where it is transported round the body as oxyhaemoglobin.
Answer:
He should have taken all standard precautions because they should be practiced in every case.
Explanation:
Mutations in the HTT gene cause Huntington disease. Hope that helps
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