In some mammals, increased melatonin levels cause a decrease in ____ production
a. aldosterone
b. ADH
c. testosterone
d. insulin
e. glucagon
ANSWER: c
Biology & Microbiology
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Matt is studying how the protein transferrin enters cells. He examines cells that have taken up transferrin, and finds clathrin-coated vesicles. What mechanism was used to take transferrin into the cell?
A. Phagocytosis B. Pinocytosis C. Exocytosis D. Receptor-mediator endocytosis
Biology & Microbiology
Which genus of great apes includes bonobos?
a. Pan b. Gorilla c. Pongo d. Homo
Biology & Microbiology
Which nucleotide is added to the end of a completed messenger RNA transcript?
a. adenine b. thymine c. cytosine d. guanine e. alternating adenine and thymine
Biology & Microbiology
What does the United States's population growth look like?
A. leveling off B. a rectangular column C. decreasing D. increasing E. an upside-down pyramid
Biology & Microbiology