The diagram shows a generalized cross section of the marine environment with various zones labeled with letters.
-Innate immunity ________.
A) is activated immediately upon infection
B) depends on an infected animal's previous exposure to the same pathogen
C) is based on recognition of antigens that are specific to different pathogens
D) is found only in vertebrate animals
E) utilizes highly specific antigen receptors on B cells

Question

The diagram shows a generalized cross section of the marine environment with various zones labeled with letters. 
-Innate immunity ________.
A) is activated immediately upon infection 
B) depends on an infected animal's previous exposure to the same pathogen 
C) is based on recognition of antigens that are specific to different pathogens 
D) is found only in vertebrate animals 
E) utilizes highly specific antigen receptors on B cells

Quizplus · Accepted Answer

Innate immunity is the first line of defense and is activated immediately upon infection. It does not depend on previous exposure to the same pathogen and is based on recognition of general patterns that are associated with a broad range of pathogens. It is found in both vertebrate and invertebrate animals. B cells, which have highly specific antigen receptors, are part of the adaptive immune response.

The Diagram Shows a Generalized Cross Section of the Marine