The Dolly Varden Char Is Found at Higher Altitudes Than

question 26

Multiple Choice

The Dolly Varden char is found at higher altitudes than another fish species,the white-spotted char.One reason this occurs is because

• A) Dolly Varden char cannot occupy the habitat where white-spotted char live even when there are no white-spotted char there.
• B) Dolly Varden char could outcompete white-spotted char and they actually are found in lower altitude zones where white-spotted char live.
• C) The boundary is due to temperature-mediated competition that favors white-spotted char.
• D) The boundary is due to behavioral and morphological-mediated competition that favors white-spotted char.

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Definitions:

Mid-ocean Ridge

A worldwide submarine mountain chain, developed through the action of plate tectonics.

Southeastern Asia

A geographic region consisting of countries situated to the southeast of Asia, including Indonesia, Thailand, and Vietnam.

Indian Ocean

The third largest ocean in the world, bounded by Africa to the west, Asia to the north, Australia to the east, and the Southern Ocean to the south.

Fault Strength

A measure of how resistant a fault is to movement or slip under tectonic stresses.