Fossils of Thrinaxodon,a Species That Lived During the Triassic Period,have

question 10

Multiple Choice

Fossils of Thrinaxodon,a species that lived during the Triassic period,have been found in both South Africa and Antarctica.Thrinaxodon had a reptile-like skeleton and laid eggs,but small depressions on the front of its skull suggest it had whiskers and,therefore,fur.Thrinaxodon may have been warm-blooded.Thrinaxodon shows _____.

• A)that fossils found in a given area look like the modern species in that same area
• B)that species must adapt to their environment
• C)that mammals likely evolved from a reptilian ancestor
• D)that Antarctica and South Africa separated after Thrinaxodon went extinct
• E)that organisms have stable traits over time

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Definitions:

Visual Acuity

The clarity or sharpness of vision, a measure of how well a person can see details at a distance.

Vestibular Branch

The division of the vestibulocochlear nerve that provides sensory input for balance and spatial orientation from the inner ear to the brain.

Vestibulocochlear Nerve

The eighth cranial nerve responsible for transmitting sound and equilibrium (balance) information from the inner ear to the brain.

Balance

The ability to maintain stability of the body’s center of gravity over its base of support, achieved through various processes in the sensory and motor systems.