Which is the best classification for West Nile virus? food-borne illness
irradiated disease
antibiotic resistant bacteria
emerging infectious disease

b) chemical ( the chemical breakdown of food is accomplished by enzymes. )

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answer; i believe its echoic memory,it is believed to last three to four seconds; good luck

after receiving a stimus, the sensory receptors send(s) signals to the appropriate area of the body.  

the must be sensory neurons.  

hope its .

•there must be variation for the particular trait within a population.

•the variation must be inheritable (that is, it must be capable of being passed on from the parents to their offspring).

•individuals with one version of the trait must produce more offspring than those with a different version of the trait.good

explanation: