Australia and Eurasia Each Have a Mouse-Like Mammal, One a Marsupial

question 1

Multiple Choice

Australia and Eurasia each have a mouse-like mammal, one a marsupial, the other a placental. These distantly related species are an example of ____.

• A) disjunct dispersal
• B) disjunct vicariance
• C) adaptive radiation
• D) convergent evolution
• E) distant migration

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Definitions:

Swim Bladders

Gas-filled sacs in fish that help maintain buoyancy in the water column.

Countercurrent Exchange

A mechanism in organisms where two fluids flow in opposite directions, exchanging properties (such as heat or solutes) to allow for efficient transfer.

Concurrent Exchange

A mechanism often seen in biological systems where two substances flow in opposite directions and exchange properties or elements, enhancing efficiency.

Oxygen Extracted

The process of removing oxygen from a compound or an environment, often to produce a specific chemical reaction.