3. Answer the following in one sentence. a. Define sonority. -
b. What is a vaccine?
c. Define Irrigation.
d. What is a polymer?​

a) The quality or fact of being sonorous.

b) A vaccine is a biological preparation that provides active acquired immunity to a particular infectious disease. A vaccine typically contains an agent that resembles a disease-causing microorganism and is often made from weakened or killed forms of the microbe, its toxins, or one of its surface proteins. 

c) The supply of water to land or crops to help growth, typically by means of channels.

d) A substance which has a molecular structure built up chiefly or completely from a large number of similar units bonded together, e.g. many synthetic organic materials used as plastics and resins.

its the cell wall and the they are unique to plant

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