Based on the Figure Above,use Phylogenetic Reasoning to Explain Whether

question 23

Essay

Based on the figure above,use phylogenetic reasoning to explain whether feathers evolved for flight,and why.What other possible advantages could feathers provide? Is there a way to determine which was the original selective function? Explain your answer.

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Definitions:

Negative Reinforcement

A behavioral principle where the removal of an unpleasant stimulus following a desired behavior increases the likelihood of the behavior occurring again.

Positive Reinforcement

A method of strengthening desired behaviors by presenting a desirable stimulus after the behavior occurs.

Probability

A measure or estimation of how likely it is that an event will occur, expressed as a number between 0 and 1, where 1 denotes certainty.

Avoidance Learning

A learning process by which an individual learns a behavior or response to avoid an unpleasant stimulus or situation.