Consider the Ratio of Oxygen 18 to Oxygen 16 in the Shells

question 50

Multiple Choice

Consider the ratio of oxygen 18 to oxygen 16 in the shells of organisms that lived in the sea during the geologic past. Which of the following describes the relationship between this ratio and the climate at that time?

• A)the higher the ratio, the drier climate at that time
• B)the higher the ratio, the wetter climate at that time
• C)the higher the ratio, the colder climate at that time
• D)the higher the ratio, the warmer climate at that time

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Definitions:

Total Parenteral Nutrition

A method of feeding that bypasses the gastrointestinal tract, providing nutrition directly into the bloodstream for those unable to eat or absorb food normally.

Central Venous Catheter

A medical device inserted into a large vein, typically in the neck, chest, or groin, used to administer medications, fluids, or obtain blood tests.

Injection Port

A medical device implanted under the skin that allows for easy and repeated access to the vascular system for the delivery of medications.

Enteral Feeding

A method of supplying food to the gastrointestinal tract through a tube when oral intake is inadequate or impossible.