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Accidental wastewater spills from unconventional oil production in North Dakota have caused widespread water and soil contamination, a new study finds. Researchers found high levels of contaminants and salt in surface waters polluted by the brine-laden wastewater, which primarily comes from fracked wells. Soil at spill sites was contaminated with […]

In accordance with the Theory of Evolution, Natural Selection is mechanism through which the evolution happens. Advantageous traits survive the longest and leave the most offspring, a process termed as Natural Selection. Select an animal species. Your goal is to explain the way where an evolutionary change might takes place […]

Q. A DNA-like molecule is isolated from the frozen remains of alien life-forms found beneath the Martian North polar ice cap. The molecule is a double stranded polymer whose monomeric subunits are collected of glycerol, phosphate and nitrogenous bases, of which four kinds were found. The bases in this “glyceronucleic […]

You study two populations of zebra skipper butterflies, one on the mainland and the other on a large island several hundred miles off the coast of Brazil. In the mainland population, males and females are nearly identical in size. By contrast, females are 1.2 times larger than males in the […]