Pegmatites Are Extremely Coarse-Grained Igneous Rocks

question 29

True/False

Pegmatites are extremely coarse-grained igneous rocks.

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Definitions:

Blumenbach

Johann Friedrich Blumenbach, an 18th-century German physician and anthropologist known for his works on human classification.

One Drop Rule

A racial classification system that asserts any person with even one ancestor of sub-Saharan African ancestry ("one drop" of African blood) is considered Black.

Biological Definition

A precise scientific description of an organism or a condition using biological terms and concepts.

Race

In biology, the taxonomic category of subspecies that is not applicable to humans because the division of humans into discrete types does not represent the true nature of human biological variation. In some societies, race is an important cultural category.