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.
MUCUS PROTECTS. Mucus moistens and warms inhaled air and keeps the mucus membrane cells and the little hairs called cilia lubricated. These little hairs line the top layer of mucus membrane cells. Cilia helps to remove inhaled particles that have gotten trapped by the mucus layer covering the cilia. They need to stay moist to do their job.