All of the following are defense mechanisms employed by vertebrates except
A)specific antibodies.
B)negative test,as in,not finding self-markers.
C)skin and mucous membranes as barriers.
D)positive test to recognize presence of nonself-markers.
E)change in chromosomal composition.

Question

Quizplus · Accepted Answer

A change in chromosomal composition is not a defense mechanism employed by vertebrates. The other options listed are valid defense mechanisms used by vertebrates to protect themselves from foreign invaders.

All of the Following Are Defense Mechanisms Employed by Vertebrates