You Discover a Fossil with Feathers on Forelimbs,short Hind Limbs,and

question 55

Multiple Choice

You discover a fossil with feathers on forelimbs,short hind limbs,and teeth.You conclude that this organism appears early on a phylogenetic tree for which group of organisms?

• A)reptiles
• B)birds
• C)mammals
• D)snakes

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Definitions:

Unlearned Tendencies

Innate behaviors or predispositions not acquired by learning or experience.

Facial Expressions

Visible changes in the face that convey an individual's emotions to others, including happiness, sadness, anger, and fear.

Deaf and Blind

Refers to the condition in which an individual is unable to hear and see to a significant extent.

Duchenne Smile

A genuine smile that involves contraction of both the zygomatic major muscle (raising the corners of the mouth) and the orbicularis oculi muscle (raising the cheeks and forming crow's feet around the eyes).