A Low Oxygen Level in the Gulf of Mexico

question 23

Multiple Choice

A low oxygen level in the Gulf of Mexico

• A) kills most bottom organisms.
• B) is responsible for a decline in Gulf fisheries.
• C) has been linked to excess nutrients supplied by the Mississippi River.
• D) kills most bottom organisms and has been linked to excess nutrients supplied by the Mississippi River.
• E) kills most bottom organisms, is responsible for a decline in Gulf fisheries, and has been linked to excess nutrients supplied by the Mississippi River.

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Definitions:

Downregulation

The process by which a cell decreases the quantity of a cellular component, such as RNA or protein, in response to an external variable.

Withdrawal

The process or experience of stopping or reducing the use of a psychoactive substance, often leading to uncomfortable symptoms.

ATP

Adenosine triphosphate, a molecule that stores and transfers energy within cells, enabling metabolic processes to take place.

ADP

Adenosine diphosphate, a molecule involved in energy transfer within cells, and is produced through the breakdown of ATP, with the release of energy.