Suppose a Population of Mostly Sand-Colored Crabs Migrates from a Sand

question 37

Multiple Choice

Suppose a population of mostly sand-colored crabs migrates from a sand beach to a pebble beach and evolves a darker, speckled coloration that closely resembles the pebble beach. This is an example of

• A) directional selection.
• B) stabilizing selection.
• C) disruptive selection.
• D) sexual selection.
• E) genetic drift.

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Definitions:

Trendelenburg

A position with the head lower than the feet.

Lithotomy

An examination position wherein the patient lies on the back with thighs flexed upon the abdomen and legs flexed upon the thighs.

Operating Scissors

A surgical instrument specifically designed for cutting tissues during surgical procedures.

Dressings

Materials used in medicine to cover and protect wounds.