Through genetic analysis in the 1970s, an evolutionary biologist showed that there was a very low percentage of human variation existing among groups seen as racially separate. who was this individual

The answer is Richard Lewontin.

Explanation:

Richard Lewontin is an American evolutionary biologist who's findings regarding race and genetics have set a landmark in understanding human differences. He studied the differences among races by studying the variation in protein types in blood, in this study he found that there was only 15% of variation across races.

According to Lewontin, from a genetic point of view, human populations are very similar to each other; this argument defied the notion of "biological race" and set a precedent for the study of race as a social construct.

hygrometers and hair thermometers (often found as part of hygrometers/psychrometers) can be used to measure humidity. barometers are used to measure atmospheric pressure, while anemometers are used to measure wind speed. so the 2nd and 4th choices should be the correct answers.

muslims have taken his goods and products to different parts of asia an indonesia. sometimes just traveled and trade, but in other occasions, stayed in the place and made a living.

trade was the key for muslims economies to prosper. their commerce routes reached far places like malaysia and java in the 11th century.

another important factor for prosperity was that muslim states served as the middle point for european traders.

they used to travel by land but sailing the seas -the indian ocean- really increase the exportation of products.