How do immunizations fight the polio epidemic?
a . they provide the body with a deadly antigen that allows the body to produce high concentrations of t-killer cells.
b. they provide the body with a safe antigen that allows the body to then prepare antibodies if it is ever exposed to the real virus.
c. they provide the body with a compmiment protein that enables the body to recognize and destroy all viruses.
d. they provide the body with a boost of white blood cells that the body can increase in number during an infection.

hey there!

so, when you eat, your teeth chew and grind food into smaller pieces. this is mechanical digestion. then reactions aided by digestive enzymes break down large food molecules into smaller molecules. this is chemical digestion. the two processes change the food into simpler substances that can be used by the body for raw materials and energy.

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tobey

it's     c       this is a cell (b) with a nucleus (c) containing dna (a). the dna is organized into chromosomes (d). a section of the chromosome that codes for a trait is called a gene (e).