An excess of T3 and T4 in the blood is hyperthyroidism, which in its most common form is called
A) goiter.
B) sterility.
C) Graves' disease.
D) botulism.
Answer: C
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Which is not true about a crown gall tumor?
A. It is a bacterial infection of plants. B. It requires a plasmid. C. It produces a large amount of opines that neither the plant nor bacteria synthesizes. D. It is due to the incorporation of bacterial plasmid DNA into the plant chromosome. E. All of the choices are true.
sexual reproduction includes
What will be an ideal response?
Which of the following is associated with the attachment of a bacteriophage to a bacterial cell?
A) random collisions B) chemical attractions C) receptor specificity D) both chemical attractions and receptor specificity E) random collisions, chemical attractions, and receptor specificity
Evolution at the genomic level involves changes in
A. DNA and histone relationships. B. chromosome structure and number. C. sequences of nucleotides in RNA molecules. D. incorporation of new organelles such as the mitochondrion. E. sequences of amino acids in proteins.