Which of the following diseases is considered an autoimmune disease triggered by bacterial infection?
A) glomerulonephritis caused by the group A streptococci
B) scarlet fever
C) rheumatic fever
D) impetigo
E) toxic shock syndrome
C
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Crossing over
a. increases variability in gametes. b. results in only one exchange per homologue. c. occurs between sister chromatids. d. prevents genetic recombination. e. is followed immediately by separation of each of the chromatids.
Gene therapy strives to ________
A) mitigate the symptoms of a disease state B) cut out defective genes C) provide new gene sequences to make people stronger D) cure the disease state
The length of time that Darwin's round-the-world voyage took was about ________
Fill in the blank(s) with correct word
The outer segments of cones and rods contain ____
a. metabolic machinery b. light-inhibiting photopigments c. light-absorbing photopigments d. synaptic terminal e. ciliary muscles