Which hormone is responsible for the development of female secondary sex characteristics?
A. Testosterone
B. Estrogen only
C. Progesterone only
D. Estrogen and progesterone
E. Human chorionic gonadotropin
Answer: B
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Exchange of genetic material among different species is called
A. homolgous gene exchange. B. horizontal gene transfer. C. exon shuffling. D. genetic recombination. E. exon shuffling and or genetic recombination.
In which year does it appear that the climate was most conducive to growth?
a. 2009 b. 2010 c. 2011 d. 2012
Tertiary and quaternary structure of proteins involves ________ bonds
A) hydrogen B) ionic C) polar covalent D) nonpolar covalent E) ionic, hydrogen, polar, and nonpolar covalent
What is the most important factor that controls the seasonal distribution of rain in the Tropical Savanna Climate (Aw)?
A. the strength of the westerlies B. north-south migration of the Intertropical Convergence Zone and the Subtropical High C. the movement of the subpolar low D. the leeward rainshadow effect