Osmoregulatory adjustment via the renin-angiotensin-aldosterone system can be triggered by _____
A) sleeping for one hour
B) severe sweating on a hot day
C) eating a pizza with olives and pepperoni
D) drinking several glasses of water
B
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In sickle cell anemia, the defective hemoglobin differs from the normal hemoglobin by
A. the color of the pigment. B. the size of the molecule. C. a single amino acid substitution. D. the total number of amino acids. E. the type of blood cell it is found in.
You need to explain to your study group why the breathing ability of amniotes is different than that of amphibians. Your classmates argue that something like a terrestrial salamander is identical in its breathing mechanism to an amniote. To convince them of the critical breathing innovations of amniotes, you report that in order to breathe as an amniote does, the terrestrial salamander would have to
A. grow scales on its body. B. develop new muscular associations in the ribcage. C. grow lungs. D. reduce the size of its mouth.
A radula is which of the following?
a. foot b. feeding organ c. ear d. sensitive hair e. balance organ
Which of the following occurs when RNA polymerase attaches to the promoter DNA?
A) elongation of the growing RNA molecule B) termination of the RNA molecule C) initiation of a new RNA molecule D) initiation of a new polypeptide chain