Systemic lupus erythematosus (SLE or lupus) is distinct from other autoimmune disorders because
A. it is also a hypersensitivity disorder.
B. it involves an antibody response.
C. multiple organs and tissues are affected.
D. it may be triggered by an infection.
E. there is a genetic predisposition.
Answer: C
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Four of the five features listed below are found in
sponges. Select the exception. a. mesoglea b. spicule c. gemmule d. flagellated collar cells e. amoeboid cells
Legume plants provide certain amino acids to the ________ so that they do not need to assimilate ________. In return, the bacteroids shuttle amino acids bearing the fixed nitrogen back to the plant.
A. bacteroids; ammonia B. bacteroids; nitrogen C. bacteroids; phosphorus D. root hairs; nitrogen
Which level of taxonomy encompasses all of the others?
a. family b. class c. order d. species e. genus
What is the maximum number of electrons in a shell?
a. 0 b. 2 c. 6 d. 8 e. 12