Which of the Following Is the Most Limiting Element in Marine

question 21

Multiple Choice

Which of the following is the most limiting element in marine ecosystems?

• A) iron
• B) sulfur
• C) carbon
• D) phosphorous
• E) hydrogen

---

Definitions:

Eructation

The act of belching or burping, releasing gas from the digestive tract through the mouth.

Cholangiography

A diagnostic imaging test used to visualize the bile ducts to identify obstructions, infections, stones, or cancers.

Colonoscopy

A medical procedure that uses a long, flexible tube with a camera on the end to examine the interior of the colon and rectum.

Cholecystography

A radiographic examination of the gallbladder after the administration of a radiopaque contrast medium.