The Largest Estuary in the United States Is the Chesapeake

question 6

Multiple Choice

The largest estuary in the United States is the Chesapeake Bay, which extends through six states. The Bay is one of the most productive natural areas in the world. It is home to thousands of plants and animals, including many commercially important species. The water of the Bay is relatively shallow. Many areas are no more than 10 feet deep, with an average depth of 30 feet. Light penetrates the shallow water and supports submerged plants that provide food and shelter for the many species living in the bay ecosystem. However, like many estuaries, the Bay receives large amounts of fertilizer runoff from farms, lawns, and wastewater treatment facilities.
-Fertilizer runoff contains ________, which are the most important limiting factors for phytoplankton growth.

• A) carbon and hydrogen
• B) oxygen and carbon dioxide
• C) nitrogen and phosphorus
• D) sulfur and magnesium

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Definitions:

Absolute Threshold

The minimal amount of energy that can produce a sensation.

Sensory Adaptation

The processes by which organisms become more sensitive to stimuli that are low in magnitude and less sensitive to stimuli that are constant or ongoing in magnitude.

Depth Perception

The ability to perceive the visual environment in three dimensions and to judge the distance of objects, crucial for navigating and interacting with the surroundings.

Retina

The area of the inner surface of the eye that contains rods and cones.