Cladistics is a method of determining the age of fossils
a. true
b. false
Answer: b. false
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Why do the functions of many receptor kinases depend on the fluid nature of the plasma membrane?
A. The generation of cAMP requires a fluid membrane. B. Binding of ligand to the receptor requires a fluid membrane. C. The receptor monomers must move together and dimerize to be activated. D. Phosphorylation requires a fluid membrane.
HIV attacks a variety of cell types but the most critical are
A. red blood cells. B. nerve cells. C. platelets. D. T helper cells.
If the Tn10 transposon is used to mutagenize a bacterium for the purpose of creating a mutation in the his operon, what would be the most appropriate selection media?
A) rich media that contains all of the amino acids supplemented with tetracycline B) minimal media supplemented only with histidine C) minimal media supplemented with tetracycline and histidine D) minimal media supplemented with tetracycline alone
Baroreceptors, which are located in the carotid artery, aorta, and kidneys, are MOST sensitive to changes in:
A) fluid volume. B) blood pressure. C) acid-base balance. D) sodium concentrations.