hormone
What will be an ideal response?
a chemical signaling molecule, usually a protein or steroid, secreted by an endocrine gland or group of endocrine
cells; acts to control or regulate specific physiological processes
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Consider the global nitrogen cycle depicted in the figure above. What is the limiting portion of the cycle for plants?
A) industrial nitrogen fixation B) nitrogen lost to the atmosphere C) internal nitrogen cycling in the oceans D) nitrogen fixation by bacteria
Free energy change is equal to zero at equilibrium.
Answer the following statement(s) true (T) or false (F)
The combination of a virus's genetic material and protein is called the
a. capsid. b. virion. c. nucleocapsid. d. envelope. e. transfer RNA.
The binding of a neurotransmitter to ligand-gated Cl? channels will cause ____ in the postsynaptic
membrane.
a. depolarization b. hyperpolarization c. repolarization d. apolarization e. depolarization and repolarization