Why does genetic variation increase the chance that some individuals in a population will survive? Genetically diverse populations display high phenotypic variation. If changing environmental conditions favor a particular phenotype there is a good chance that genetically diverse population will have some individuals who have that advantageous phenotype.
As well, the candles produce large particles in their smoke and there have been concerns about how safe it is to regularly breathe in this smoke. Mosquito coils: Like citronella candles, mosquito coils produce a smoke that confuses mosquitoes. The coils contain the insecticide allethrin.
The primary function of the spark plug is to ignite the air-fuel mixture within the combustion chamber under any operating condition. Spark plugs must provide a path and a location for electrical energy from the ignition coil to create a spark used to ignite the air-fuel mixture.