In the Experiment in Which Stickleback Fish (Gasterosteus Aculeatus) Were

question 35

Multiple Choice

In the experiment in which stickleback fish (Gasterosteus aculeatus) were presented with high- and low-quality habitats, why would fish disperse from the high-food side of the aquarium to the low-food side?

• A) The low-food side increased in quality.
• B) The high-food side decreased in quality.
• C) The low-food side per capita benefit equaled that of the high-food side.
• D) The low-food side per capita benefit was less than the high-food side.

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Definitions:

Marsupial Colonization

The process by which marsupials, a group of mammals typically characterized by premature birth and continued development in the mother's pouch, spread and establish populations in new areas.

Vicariant Events

Geological occurrences that physically separate organisms, leading to speciation by dividing ancestral populations into two or more reproductively isolated groups.

Plate Tectonics

The scientific theory describing the large-scale motion of seven large plates and the movements of a larger number of smaller plates of the Earth's lithosphere.

Biogeographers

Scientists who study the distribution of species and ecosystems in geographic space and through geological time.