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.
Tumbler candles come in a straight-sided glass container with a silver toned metal lid. These candles come in two different sizes and offer the same scents as the jar candles. The large tumbler candle is 22 ounces and will provide fragrance for up to 85 hours. The smaller tumbler candle is shorter and has 7 ounces of wax with 35 to 45 hours of fragrance.