Heterozygote advantage should be most closely linked to which of the following?
A) sexual selection
B) stabilizing selection
C) random selection
D) directional selection
E) disruptive selection
Answer: B
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Gene technology has made it possible for bacteria to express human genes. Why is this possible?
Answer questions 94–98 in reference to the five plant tissues
listed below. a. parenchyma b. collenchyma c. sclerenchyma d. xylem e. phloem D 94. Ground tissue of plants, sometimes containing lignin that strengthens the adult plant. E 95. Vascular tissue that conducts and distributes food to plant cells. E 96. Vascular tissue that conducts water and dissolved salts throughout a plant. D 97. Vascular tissue of a plant composed of tracheids and vessel members. D 98. Plant tissue involved in regeneration following a wound.
Rabbits and rodents are the chief reservoirs of the causative agent of ________.
A. brucellosis B. plague C. Lyme disease D. tularemia E. mononucleosis
The form of RNA that carries the code from DNA to the site of protein assembly is called __________.
A. messenger RNA. B. nuclear RNA. C. ribosomal RNA. D. transfer RNA. E. structural RNA.