________ regulates the kidney's retention of water. Its secretion is suppressed by alcohol.
A. Thyroxine
B. Vasopressin (ADH)
C. Oxytocin
D. Prolactin
Answer: B
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A ________ is a DNA molecule used in hybridization reactions to detect the presence of a particular gene in separated DNA fragments.
A. blot B. vector C. probe D. plasmid
The actinoplanetes can be found in ________ habitats.
A. freshwater B. marine C. soil D. All of the choices are correct.
For water to leave a kidney tubule by osmosis, the interstitial fluid around that region of tubule must be ____ relative
to the filtrate inside the tubule. a. hypertonic b. hypotonic c. isotonic
d. osmotic e. permeable
Which factor is NOT responsible for the increase in the size of human population?
A. Clothing B. Medicine C. Sanitation D. Innovations in agriculture E. Increased total fertility rate