. In which of the following does a rash start on the palms and soles and progress toward the trunk?
A. Epidemic typhus
B. Typhoid
C. Lyme disease
D. Impetigo
E. Rocky Mountain spotted fever
E.
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In many bacteria, genes that confer resistance to antibiotics are carried on
A) F factors. B) R plasmids. C) introns. D) exons.
During gastrulation in frog embryos, fibronectin provides
A) an extracellular anchorage for migrating cells. B) regulates actin-myosin interactions in the cytosol of migrating cells. C) reduces the entry of calcium ions into migrating cells. D) regulates mRNA movement out of the nucleus of a moving cell. E) the pigment that accumulates in the primitive streak
How does the DNA repair mechanism distinguish the old strand from the new strand shortly after replication?
A. the old strand is methylated while the new strand is not B. the old strand will contain thymine while the new strand contains uracil C. the new strand is methylated while the old strand is not D. the new strand has amino acids instead of nucleotides
All vertebrates have a(n) __________ system of secretory glands and cells. Fill in the blank(s) with the appropriate word(s)