Melatonin regulates
a. heart rhythms in song birds.
b. the stimulation of cancer cell growth in
humans.
c. the menstrual cycle in human females.
d. sleep cycles in humans.
e. milk production in mammals after giving
birth.
D
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The male gametophyte in flowering plants forms in a
a. corolla. b. receptacle. c. stamen. d. calyx. e. carpel.
When PCR amplification of SSU (small subunit ribosomal RNA) yields a population of different PCR products of about the same molecular weight, these fragments can be separated for further analysis by ________.
A. DNA hybridization B. denaturing gradient gel electrophoresis C. size exclusion chromatography D. isoelectric focusing
Siderophores:
A. Are used to detoxify oxygen intermediates in bacterial growth medium B. Are proteins that can form chelating complexes to obtain iron for an organism C. Are non-reusable forms of iron produced by the liver D. Aid in energy retention in the electron transport chin E. Control the breakdown of various organic substances
The most deadly form of systemic leishmaniasis is called ________.
Fill in the blank(s) with the appropriate word(s).