Which is the correct order of the activity of the
hormones involved in gamete formation?
a. GnRH>>LH>>FSH>>testosterone
b. FSH>>LH>>GnRH>>testosterone
c. GnRH>>FSH>>LH>>testosterone
d. LH>>FSH>>GnRH>>testosterone
e. LH>>FSH>>GnRH>>testosterone
A
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Salt is often used to melt ice on roads during the winter because it lowers the freezing/melting point of water. When salt dissolves in water, individual Na+ and Cl- ions break away from the salt lattice and become surrounded by water molecules. Why would this cause ice to melt?
A. Hydrogen bonds are broken, and the salt ions interfere with interactions between H and O. As a result, it is more difficult for water molecules to bond and form ice. B. Hydrogen bonds are formed, and the salt ions bond with O. As a result, it is more difficulty for water molecules to bond and form ice. C. Hydrogen bonds are broken, and the salt ions bond with O and H respectively. As a result, it is more difficult for water molecules to bond and form ice.
The earliest evidence of biochemical reactions by living cells dates to about ____ billion years ago
a. 0.5 b. 1 c. 1.5 d. 2 e. 3.7
Which element is a density-dependent factor that controls the size of a population?
a. wind velocity b. light intensity
c. resource availability d. temperature e. wave action in an intertidal zone
Chromosomes that do not determine the sex of an individual are called ______.
A. autosomes B. sex chromosomes C. nonhomologous chromosomes D. homologous chromosomes