Which is an example of a stimulus and the accompanying response of an organism

Stimulus: infection, response: fever

Explanation:

Before an infection for example of bacterial origin (stimulus: infection), the organism triggers an immune mechanism to fight said bacterium, being a response the fever (temperature increase)

Answer:

Touching a hot object (stimulus) and rapid withdrawal of hand (accompanying response), or a rat scurries past, and a python strikes at it.

Explanation:

Stimulus and the accompanying response is an innate or instinct behavior of an organism. It is genetic by nature. All organisms of one species have the same innate behaviors. Organisms of different species have different innate behavior according to their ecology, exposure, and environment in order to survive.

Fixed action pattern (FAP) is an example of innate behavior which differs from species to species. For example - Chicks of kelp gulls are stimulated by a red spot (stimulus) on the mother gull's beak and peck at the spot (accompanying response), which induces regurgitation (result).

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

the must be sensory neurons.  

hope its .

genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).