Which of the Following Outcomes Is the Most Likely Evolutionary

question 27

Multiple Choice

Which of the following outcomes is the most likely evolutionary effect of duplication of homeotic Hox genes?

• A) It permitted the evolution of novel forms.
• B) It caused the extinction of major groups.
• C) It reduced morphological diversity of simple forms of life.
• D) It allowed the reversal of the head-tail orientation of animals.

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Definitions:

Neutral Stimulus

A stimulus that initially produces no specific response other than focusing attention, until it is associated with an unconditioned stimulus.

Meaningful Stimulus

Any input from the environment that is significant and can induce a response because of its relevance to the individual.

Erikson's Theory

Refers to a comprehensive psychoanalytic theory that identifies a series of eight stages, each associated with a particular psychosocial conflict that contributes to a major aspect of personality.

Psychosocial Development

A theory proposed by Erik Erikson that emphasizes the importance of social experiences throughout life, detailing eight stages from infancy to adulthood where challenges must be overcome.