What Led Darwin to Change His Beliefs About Fixity of Species

question 51

Multiple Choice

What led Darwin to change his beliefs about fixity of species?

• A) renewed interest in the biblical account of creation
• B) observation of language variation in human populations in the British Isles
• C) observations of no documentable difference in plant and animal population over wide geographic areas
• D) observations that distinct but closely related groups of plants and animals inhabited isolated islands
• E) none of these

Recognize the impact of stimulants and other substances on prenatal development and infant health.

Understand the concept of organogenesis and its timing during prenatal development.

Identify the layers of cells in the embryo and their developmental significance.

Understand the effects of teratogens on prenatal development.

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Definitions:

Unborn Child

A term referring to a fetus or embryo that has not yet been born, particularly in discussions about prenatal care and rights.

Klinefelter Syndrome

A genetic condition affecting males, characterized by an additional X chromosome, which can lead to developmental and physical differences.

XXY Sex Chromosomal

A chromosomal configuration associated with Klinefelter syndrome, where a male has an additional X chromosome, leading to physical, developmental, and reproductive variations.

Double Helix

Describes the structure of DNA, consisting of two strands that wind around each other like a twisted ladder.