As Discussed in the Text, Long-Term Continental Drift Had Significant

question 17

Multiple Choice

As discussed in the text, long-term continental drift had significant evolutionary ramifications because

• A) groups of animals were no longer isolated from each other by oceans.
• B) the distribution of mammals and other land vertebrates were unaffected.
• C) geological activities induced volcanic activities which decimated populations of placental mammals.
• D) groups of animals were isolated from each other by oceans.
• E) scientists can map the changes that occurred.

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Definitions:

Crest

In anatomy, a crest refers to a prominent ridge or raised surface on the skeleton.

Foramen

An opening or hole in a bone or between body cavities that allows the passage of nerves or blood vessels.

Medullary Cavity

The central cavity of bone shafts where red bone marrow and/or yellow bone marrow (fat) is stored.

Bone-Forming Cells

Cells known as osteoblasts that are responsible for the synthesis and mineralization of bone during both initial bone formation and later bone remodeling.