The Heart in a Human Embryo Begins to Beat Around

question 86

Multiple Choice

The heart in a human embryo begins to beat around ___ after fertilization.

• A) 5 days
• B) 3 weeks
• C) 7 weeks
• D) 9 weeks
• E) 12 weeks

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Definitions:

Conditioned Response

A learned response to a previously neutral stimulus that occurs after conditioning or training.

Dependent Variable

In research, the variable that is being measured and is expected to change in response to manipulations of the independent variable.

Median

A statistical measure that represents the middle value in a given set of data when the values are arranged in ascending or descending order.

Central Tendency

A statistical measure that identifies a single value as representative of an entire distribution of data.