Evolution Has Provided Enormous Diversity in the Number of Vertebrae

question 1

Multiple Choice

Evolution has provided enormous diversity in the number of vertebrae among vertebrate species.Vertebrae are differentiated during embryonic development by

• A)the pattern of homeotic gene expression.
• B)hormone induction.
• C)the length of the backbone.
• D)the degree of structural support needed.

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Definitions:

Rumination

A focused attention on the symptoms of one's distress, and its possible causes and consequences, rather than its solutions.

Self-Control

The ability to regulate one's emotions, thoughts, and behaviors in face of temptations and impulses.

Progesterone Levels

The concentration of progesterone, a hormone important for the regulation of menstruation and pregnancy, in the bloodstream.

Type D Personality

A personality trait marked by significant negative emotions and a tendency towards avoiding social interactions.