Which of the following diseases makes antibodies against centromeres and topoisomerases?
A) Sjögren's syndrome
B) scleroderma
C) rheumatoid arthritis
D) poststreptococcal glomerulonephritis
E) systemic lupus erythematosus
Answer: B
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After the depolarization phase of an action potential, the resting potential is restored by _____
A) the opening of sodium activation gates B) the opening of voltage-gated potassium channels and the closing of sodium channels C) a decrease in the membrane's permeability to potassium and chloride ions D) a brief inhibition of the sodium-potassium pump E) the opening of more voltage-gated sodium channels
According to evidence from ice layers from the
Antarctic, atmospheric carbon dioxide levels have been rising since
a. the dinosaurs went extinct. b. for the last 10, 000 years. c. the industrial revolution began. d. the 1970s. e. human evolved 200, 000 years ago.
In the section "Investigating Life: The Battle for Position in Cacao Tree Leaves", an endophyte absorbs nutrients and water from a live cacao leaf in what type of feeding?
A. a decomposer B. an autotroph C. a detritovore D. a producer E. a heterotroph
Classical conditioning and operant conditioning differ in that they apply, respectively, to ____ and ____ behavior.
A. voluntary; involuntary B. involuntary; voluntary C. instinctive; learned D. learned; instinctive E. active; passive