For Each Historical Identification Question, Define the Term and Briefly

question 66

Short Answer

For each historical identification question, define the term and briefly describe its historical significance.
Seven Years' War

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Definitions:

Germ Layer

Primary tissue layer of a vertebrate embryo—namely, ectoderm, mesoderm, or endoderm.

Ectoderm

Outermost primary tissue layer of an animal embryo; gives rise to the nervous system and the outer layer of the integument.

Differentiate

To recognize or ascertain what makes something or someone different, or in biology, the process by which cells or tissues change from relatively generalized to specialized kinds, during development.

Derived

Obtained from a specific source or originating from something; made by altering or modifying something else.