Hanna, 18 years old, is over 6 feet tall. She has an x-ray film taken that shows that her long bones are continuing to lengthen. Eventually, a thorough examination shows that she has a tumor growing in her ________
A) posterior pituitary
B) pineal gland
C) adrenal medulla
D) anterior pituitary
D
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The vaccines that are used to protect people from diphtheria and tetanus are:
A) antitoxins. B) attenuated vaccines. C) inactivated vaccines. D) toxoids.
Which is true of MRSA strains?
A. They are all resistant to vancomycin. B. They carry the R plasmid. C. They may be susceptible to linezolid. D. The carry the R plasmid AND they may be susceptible to linezolid.
Salt marsh cordgrass is consumed by herbivorous marsh periwinkle snails, which in turn are consumed by blue crabs
Research has shown that cordgrass productivity is controlled ____.
a. indirectly by the abundance of snails b. indirectly by the abundance of snail predators c. directly by the abundance of snail predators d. directly by the availability of nutrients in the salt marsh e. indirectly by the amount of sunlight penetrating the water
The degeneracy of the genetic code refers to the fact that
a. the code has some codons that do not specify an amino acid. b. the code has most amino acids represented by more than one codon. c. the code varies considerably between different organisms. d. the code is commaless, with no indicators of spaces between codons. e. the code varies considerably between different cell types within a multicellular organism.