Answer:
Glycogen
Explanation:
In humans polysacchride is stored in the form of glycogen and used as a source of energy.
I believe the answer is B. <span>The antibodies on B cells bind to the antigens on the pathogen's surface.
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This statement is true. Early land animals indeed had gills as well as lungs. It is generally known that amphibians breathe through their skin, like how the lungs needed the skin for its respiratory. Fish have gills for breathing while mammals do have their nasal cavity and lungs for their gas exchange.
