Autoimmunity is typically due to
A. a deficiency in T-cell development.
B. a transfusion reaction.
C. graft rejection.
D. IgE and mast cells.
E. autoantibodies and T cells.
Answer: E
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Yeast consume garbage and other dead organic matters, so they are called this
A) Primary consumers B) Producers C) Decomposers D) herbivores
A majority of prokaryotes are capable of carrying out nitrogen fixation.
Answer the following statement true (T) or false (F)
Which of the following increases the strength of the hydrophobic interactions in lipid bilayers and thus makes them less permeable to polar molecules?
A) the presence of double bonds B) increasing temperature C) removing cholesterol D) increasing length of the hydrocarbon chains
An animal that maintains a constant salt concentration in their body is called:
a. an osmoconformer. b. an osmoregulator. c. hyperosmotic. d. hypo-osomotic.