Objective evidence of disease as noted by an observer is called
A) a sign.
B) a symptom.
C) a syndrome.
D) prodromal.
Ans: A) a sign.
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The insects in the diagram above represent all of the following except
A. herbivores.
B. the second trophic level.
C. primary consumers.
D. producers.
All cells have a plasma membrane consisting of
What will be an ideal response?
The first and second lines of defense against microbial invasion are part of
A) innate immunity. B) adaptive immunity. C) species resistance. D) microbial antagonism. E) both species resistance and adaptive immunity.
Terry takes the body of the snakelike organism and slices it open along its dorsal side. If it is a hagfish, what should Terry see?
A) a well-developed series of bony vertebrae surrounding the spinal cord B) a well-developed series of cartilaginous vertebrae surrounding the spinal cord C) a tube of cartilage (surrounding the notochord) with dorsal projections on both sides of the spinal cord D) a notochord, located underneath the spinal cord