You are living next to a field that is burning. The smoke is blowing towards your neighborhood. You are outside and there is so much smoke, you cannot see directly in front of you. Which human body systems would be MOST affected? A.
Excretory and Digestive

B.
Respiratory and Circulatory/Cardiovascular

C.
Immune and Nervous

D.
Nervous and Muscular

Hello now,

The human body system that would be most affected in this scenario would be B, the Respiratory and circulatory system.

answer: the correct option is d. enzyme

lactase and carbonic anhydrase are the examples of enzymes.

lactase is an enzyme, which is present in the small intestine of mammals. it in the digestion of the disaccharide, lactose ( milk sugar) by converting it into two monosachharide, which are glucose and galactose.

carbonic anhydrase is present in the red blood cells. this enzyme plays significant role in the transport of co₂. it in the conversion of co₂ and h₂o into carbonic acid, which is then dissociated into bicarbonate ions and hydrogen ions.