The Snakes Include Some Rather Short and Some Incredibly Long

question 40

Multiple Choice

The snakes include some rather short and some incredibly long species,with a variation from about 100 to over 300 vertebrae.What developmental mechanism is the best candidate for changing the number of vertebrae in evolution?

• A)Changes in genes that lay down extracellular matrix in bone
• B)Changes in genes necessary for neural crest development
• C)Changes in genes that control mitosis
• D)Changes in the somitogenesis clock

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Definitions:

Propaganda

Information, especially of a biased or misleading nature, used to promote or publicize a particular political cause or point of view.

External Attribution

The process of attributing the cause of one's own or another's behavior to external factors or situations.

Social Attribution

The process by which individuals explain the causes of behavior and events in social contexts, attributing these to internal or external factors.

Affiliative Attribution

The tendency to attribute one's successes or failures to factors that enhance or maintain social relationships.