What percentage of carbon's orbitals are spherical in conformation?
A. 0% B. 20% C. 40% D. 80% E. 100%
Answer: C
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Four of the five answers listed below are barriers to invasion. Select the exception
a. intact skin b. mucous membrane c. gastric juices d. blood plasma e. lysozyme
Which of the following is a hormone that regulates the reabsorption of sodium by the distal convoluted tubules and collecting ducts?
A) aldosterone B) ANP C) angiotensin D) ADH
Some microbes secrete small molecules that induce other microbes to settle nearby. When a certain number of individuals have assembled, the chemical signal is strong enough to induce the aggregation to respond collectively to stimuli. This process is called
A. quorum sensing B. mass-settling C. conjugation D. bioremediation E. mutualism
Which one of the following hormones is incorrectly paired with its site of production?
a. Releasing hormones - hypothalamus b. Growth hormone - anterior pituitary c. TSH - thyroid d. Estrogens and progestins - ovary e. Epinephrine - adrenal glan