What is the purpose of skin pigmentation? Your skin gets its color from a pigment called melanin. Special cells in the skin make melanin. When these cells become damaged or unhealthy, it affects melanin production. Some pigmentation disorders affect just patches of skin. Does skin pigmentation go away? The good news is that PIH can […]

Who showed the uniqueness of fingerprints and how they could be used for identification? 96 Cards in this Set Forensic science is the application of science to what field? Criminal justice Who showed the uniqueness of fingerprints and how they could be used for identification? Francis Galton Who figured out a way to determine the […]

Why are the insulin and glucagon feedback loops examples of negative feedback loops? Negative feedback loops are inherently stable systems. For example, negative feedback loops involving insulin and glucagon help to keep blood glucose levels within a narrow concentration range. If glucose levels get too high, the body releases insulin into the bloodstream. Why is […]

Which of the following regulates global agricultural markets? The international terms of trade – the conditions of global agricultural trade – emerged in the colonial era of the 19th century. Today they are regulated by the World Trade Organisation (WTO) and a large number of bilateral and multilateral trade agreements. Which of the following refers […]

Why is scandium useful? Scandium is mainly used for research purposes. It has, however, great potential because it has almost as low a density as aluminium and a much higher melting point. An aluminium-scandium alloy has been used in Russian MIG fighter planes, high-end bicycle frames and baseball bats. What makes gold unique among the […]

How are skeletons identified? DNA samples may be taken from any existing hair tissue. As well as positively identifying someone, it can also identify a person’s race or tribal origins. When the skeleton is first discovered, take samples from around the remains including any bugs you come across. How can you tell the age of […]

What is the difference between contrast and compare? Compare means to look for the difference between two or more things. Contrast means an obvious difference between two or more things. (noun) Example: I like the contrast of the white pants with the black jacket. also Contrast can mean to compare two people or things in […]

Why are some bacteria resistant to colistin? Colistin resistance is considered a serious problem, due to a lack of alternative antibiotics. Some bacteria, including Pseudomonas aeruginosa, Acinetobacter baumannii, Enterobacteriaceae members, such as Escherichia coli, Salmonella spp., and Klebsiella spp. have an acquired resistance against colistin. What infections are treated with colistin? Colistin, also known as […]

Which mineral is used in steel? iron ore What mineral prevents sunburn and coating for steel? ZnO Which minerals are used to strengthen steel? Magnetite and goethite are minerals that contain a lot of iron and are used to make steel. Steel is mixed with chromium to stop it from rusting. Chromium comes from the […]

Where is DNA found in a cell besides the nucleus? An organism’s complete set of nuclear DNA is called its genome. Besides the DNA located in the nucleus, humans and other complex organisms also have a small amount of DNA in cell structures known as mitochondria. Is DNA found both inside and outside of the […]