The rate and depth of breathing are governed by all of the following EXCEPT
a. chemoreceptors in arterial walls.
b. baroreceptors in the diaphragm.
c. the partial pressure of O2 in the atmosphere.
d. a respiratory center in the brainstem.
e. carotid and aortic bodies
B
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Crick and his colleagues proposed that the genetic code consists of a series of blocks of information, called ______, each corresponding to one amino acid in an encoded protein.
A. alleles B. codons C. genes D. polypeptides
In contrast to regulators, animals that are conformers:
A. are able to alter their immediate external surroundings in order to maintain homeostasis. B. have a feature of their internal body composition that matches their external surroundings. C. require large stores of ATP to maintain homeostasis. D. cannot adapt to the external environment. E. cannot live in extremely cold environments, such as the Antarctic Ocean.
Where in a tapeworm would you expect to find fertilized eggs?
A) the neck region of the strobila B) at the end of the strobila C) inside the scolex D) outside the cuticle E) in all proglottids
In Southern blotting, DNA molecules are immobilized on
A. silicon chips. B. nitrocellulose membranes. C. agarose. D. gold beads. E. paper.