The principle of comparative advantage holds that nations should
a. specialize in activities for which they have the lowest opportunity cost.
b. strive to become self-sufficient in production.
c. produce only goods and services for which they have absolute advantage.
d. become less labor-intensive and more capital-intensive.
a. specialize in activities for which they have the lowest opportunity cost.
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Hemophilia is a sex-linked recessive condition that results in deficient blood clotting. The disease causes excessive bleeding which occurs spontaneously or upon slight injury. In dogs (as in humans) hemophilia is caused by a defect in a gene on the X chromosome. What will be the results of mating between a normal, non-carrier female dog and a male dog with hemophilia?
A. All female offspring will be normal and half the male offspring will have hemophilia. B. Half the male offspring will be normal and half will have hemophilia; all females will be carriers. C. All the female offspring will be normal and all male offspring will be carriers. D. Half the female offspring will have hemophilia and half will be carriers, all male offspring will be normal. E. All of the offspring will be normal, but all females will be carriers.
What is the smallest unit that can evolve?
A. The population B. The ecosystem C. The cell D. The individual
Each DNA strand serves as which of the
following during DNA synthesis?
a. a replicate b. a substitute c. a template d. a source of nucleotides e. all of these
What is the correct sequence of events in viral reproduction?
A. attachment, penetration, biosynthesis, maturation and release B. attachment, fusion, biosynthesis, maturation, and release C. penetration, attachment, integration, biosynthesis, maturation, release D. endocytosis, uncoating, maturation, and release