In 1964, the biologists Paul Ehrlich and Holm pointed out cases where two or more clines are distributed discordantlyfor example, melanin is distributed in a decreasing pattern from the equator north and south; frequencies for the haplotype for beta-S hemoglobin, on the other hand, radiate out of specific geographical points in Africa. As the anthropologists Leonard Lieberman and Fatimah Linda Jackson observed, "Discordant patterns of heterogeneity falsify any description of a population as if it were genotypically or even phenotypically homogeneous".
To what profession do both Leonard Lieberman and Fatimah Linda Jackson belong?
anthropologists

The more long term the exposure to stress is, the more impact it may have. However, short term exposure to stress also causes impairment in memory by interfering with the function of the hippocampus. Research shows that subjects placed in a stressful situation for a short amount of time still have blood glucocorticoid levels that have increased drastically when measured after the exposure is completed. When subjects are asked to complete a learning task after short term exposure they have often difficulties. Prenatal stress also hinders the ability to learn and memorize by disrupting the development of the hippocampus and can lead to unestablished long term potentiation in the offspring of severely stressed parents. Although the stress is applied prenatally, the offspring show increased levels of glucocorticoids when they are subjected to stress later on in life.
Can a unborn child face issues with stress than can affect their future abilities?
prenatally, the offspring show increased levels of glucocorticoids when they are subjected to stress later on in life.

Some succeeded their fathers as rulers, such as Sultan Ahmad al-Mansur, who ruled Morocco from 1578 to 1608. He was not technically considered as a mixed-race child of a slave; his mother was Fulani and a concubine of his father. Such tolerance for black persons, even when technically "free", was not so common in Morocco. The long association of sub-Saharan peoples as slaves is shown in the term abd (Arabic: ,) (meaning "slave"); it is still frequently used in the Arabic-speaking world as a term for black people.
Who was the ruler in Morocco?
Sultan Ahmad al-Mansur