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Which prenatal structure forms the ascending aorta and pulmonary trunk?
Factorial Design
An experimental strategy used to study the effects of two or more independent variables simultaneously, by varying each variable across all levels of the others.
Non-experimental
Research designs that do not involve manipulation of variables but rather observe and analyze relationships as they naturally occur.
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Factorial Design
An experimental setup that involves studying the effects of two or more factors by varying them systematically.
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