Sexual reproduction involves two parents and the combination of genetic material, resulting in genetic diversity. Asexual reproduction involves one parent and produces genetically identical offspring, typically through methods like fission, budding, or vegetative propagation.
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Mosquito larvae and pupae come to the water surface to breathe. Larvae have a siphon tube to extract oxygen from the air, while pupae need to reach the surface to allow adult mosquitoes to emerge and fly away.
Your mother sprays kerosene oil on stagnant water to prevent mosquito breeding. Kerosene creates a thin film on the water surface, which interferes with mosquito larvae breathing, thereby reducing their chances of growing into adult mosquitoes and spreading diseases.
Saline water, with high salt content, is unsuitable for domestic use as it’s undrinkable, for agriculture as it harms plants by increasing soil salinity, and for industrial use as it can damage machinery and processes.
To conserve water, fix leaks promptly, use water-saving fixtures, reduce water waste by turning off taps, recycle wastewater, collect rainwater, and practice efficient irrigation methods. Awareness and responsible usage are key to effective conservation.
Earth’s atmosphere protects life by blocking harmful solar radiation, regulating temperature, and containing oxygen for respiration. It also acts as a shield against meteoroids and space debris, preventing them from reaching the surface.
Decantation relies on gravity to separate components with different densities. By slowly pouring off the top layer, the heavier sediment remains at the bottom, allowing the lighter liquid to be separated.
Common home separation methods include filtering, sieving, and centrifugation. For instance, using a sieve to separate flour from lumps or a coffee filter to separate coffee grounds from liquid are everyday examples.
A fractionating column enhances distillation by providing multiple condensation and vaporization stages, improving the separation of components with closer boiling points. This results in a more efficient and purer separation of substances.
Simple distillation is used for separating liquids with significantly different boiling points, while fractional distillation is for liquids with closer boiling points, using a fractionating column to improve separation efficiency.