Answer:
Sexual selection
Explanation:
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First the villi has a thin wall, which is only 1 cell thick this can increase the rate for diffusion and active transport of digested food into the blood since the distance is short.
The network of blood capillaries can also speed up the process.
The answer is
somatoform disorder.
Somatoform disorder, also known as somatic symptom disorder is a
mental ilness.People with this disorder experience real symptoms like pain but it may not have a physical explanation.
Doctors need to rule out other possibilities, by performing many tests, in order to diagnose as somatic symptom disorder.
The medical model of the corrections was implemented during the 1930s.
The medical model of the corrections is based on the belief that the criminal behavior of the people is because of the biological, social and psychological deficiencies. It was believed that these deficiencies needs treatment which led to the implementation of the medical model of the corrections.
Hence, the answer is '1930s'.