Questão 23

Read the following text to answer question.

Human beings have adapted to the physical world not by changing their physical nature but by adjusting their society. Animals and plants have made adjustments, over long periods, by the development of radical changes $\in$ their very organisms. Hereditary differences meet needs of various environments. But among humans, differences $\in$ head form and $\in$ other physical features are not, $\in$ most cases, clearly adaptive. Nor is it clear that mental capacities of races are different. As far as we know, the races are equally intelligent and equally capable of solving their problems of living together. The varying ways of life, it seems, are social and learned differences, not physical or inherited differences. It stands to reason, therefore, that man's adjustment to his surroundings should be studied $\in$ custom and institution, $\notin$ anatomy and neural structure.

Disponível em: http://book.google.com.br. Acesso em: 11 set. 2017.

Considering the text, humans have varying ways of life that are