A Small Flock of Birds Becomes Stranded on an Isolated

question 34

Multiple Choice

A small flock of birds becomes stranded on an isolated island during a hurricane.Their population expands across the island,and over a period of several decades,the average beak size in the population becomes smaller,helping the birds eat the smaller seeds and insects found on the island.Which one of the following processes is best illustrated in this example?

• A)Genetic drift
• B)Extinction
• C)Gene flow
• D)Natural selection

---

Definitions:

Executive Functioning

Refers to a set of cognitive processes that are necessary for the cognitive control of behavior, including attentional control, inhibitory control, working memory, and cognitive flexibility, as well as the planning and execution of tasks.

Hippocampus

A region of the brain that plays a major role in memory formation and spatial navigation.

Macular Degeneration

A medical condition which results in blurred or no vision in the center of the visual field due to aging, leading to damage to the retina and is a major cause of blindness and visual impairments in older adults.

Blindness

The condition of lacking visual perception due to physiological or neurological factors.