In an Experiment, the Main Difference Between Internal Validity and External

question 421

Multiple Choice

In an experiment, the main difference between internal validity and external validity is that

• A)external validity concerns the degree to which the experiment supports clear causal conclusions, whereas internal validity concerns the generalizability of the results
• B)internal validity concerns the degree to which an experiment supports clear causal conclusions, whereas external validity concerns the generalizability of the results
• C)internal validity is based on random sampling, whereas external validity is based on random selection
• D)internal validity is based on random selection, whereas external validity is based on random sampling

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Definitions:

Segmentation Genes

Genes that determine the number and polarity of body segments in embryonic development of organisms.

Drosophila

A genus of small flies, commonly known as fruit flies, which are widely used as a model organism in genetic research due to their fast reproductive cycle and genetic simplicity.

Segmentation Genes

Genes that determine the layout of segmented parts of an organism during embryonic development, crucial in defining body plans.

Morphogen

A substance that governs the pattern of tissue development in the process of morphogenesis, influencing the fate of cells based on its concentration.