How do scientists determine whether skeletal remains are male or female?

Answer The science of criminal investigation is an ever improving field; the ability of scientists today to discover so much from so little is impressive. Today's modern day methods and equipment can be v... Read More »

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How do scientists determine if a trace mineral is an essential nutrient or not?

Certain minerals are required in a healthy animal's diet. Minerals required in large amounts are called macrominerals, while those required in amounts so small that it is difficult to measure them ... Read More »

How do i determine if goldfish are male or female?

Identifying Male GoldfishExamine the goldfish. Look for small white bumps along the gills, which males display when they are nearing spawning times. These may extend down the pectoral fin. These sp... Read More »

How do I determine if a bird is a male or female?

ColorExamine the coloring of the birds. In some bird species, such as mallard ducks and house finches, coloring between males and females differs. Typically the male is brighter in color than the f... Read More »

How do I determine if a crayfish is male or female?

General AppearanceExamine the tail and pincers of the crayfish. Generally, male crayfish have larger pincers than females but thinner tails. Although pincer and tail size can serve as a good guide ... Read More »