Which of the following structures is NOT actively involved with saltatory conduction?
a. oligodendrocytes
b. myelin
c. Na+/K+ pumps
d. voltage-gated Na+ channels
e. nodes of Ranvier
C
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Genes associated with embryonic development are known as
A) homologous genes. B) sigma factors. C) heterologous genes. D) hopanoids. E) homeotic genes.
Which algae group has the largest multicellular forms?
A. red algae B. diatoms C. brown algae D. golden algae E. green algae
Funds from carbon offsets, which are purchased by companies and individuals, are used for many purposes. What is
one of these? a. replanting deforested areas b. burning large expanses of rainforests c. decreasing plant density in existing forests d. clear-cutting old growth forests e. converting forests to cropland
Assume the two E.coli strains shown below are allowed to conjugate. Hfr: pro+, arg+, his+, lys+, met+, ampicillin-sensitive F-: pro-, arg-, his-, lys-, met-, ampicillin-resistant What supplements would you add to glucose minimal salts agar to select for a recombinant cell that is lys+, arg+, amp-resistant?
A) ampicillin, lysine, arginine B) lysine, arginine C) ampicillin, proline, histidine, methionine D) proline, histidine, methionine E) ampicillin, proline, histidine, lysine