The First Line of Defense Against Infection Is __________

question 26

Multiple Choice

The first line of defense against infection is __________?

• A)cellular components
• B)complement proteins
• C)natural killer cells
• D)None of the above answers are correct

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Definitions:

Biological Indicators

Organisms or components of organisms that are used to assess the health of a natural ecosystem or the presence of pollutants.

Bathyal Zone

A region of the ocean depths ranging from 200 to 2,000 meters below the surface, characterized by its limited light penetration and distinct marine life.

Phytoplankton

Microscopic plant-like organisms that live in aquatic environments, capable of photosynthesis, and form the base of the oceanic food chain.

Aquatic Life Zones

Specific areas in bodies of water, categorized by depth, light penetration, temperature, and other factors, that support various forms of life, including freshwater and marine ecosystems.