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.
Full Definition of CITRONELLA. : a lemon-scented grass (Cymbopogon nardus) of southern Asia that yields an oil used in perfumery and as an insect repellent; also: its oil.See citronella defined for English-language learners.See citronella defined for kids. a lemon-scented grass (Cymbopogon nardus) of southern Asia that yields an oil used in perfumery and as an insect repellent; also: its oil. See citronella defined for English-language learners.