Which of the following is a function of the vertebrate liver?
A) combining ammonia and carbon dioxide to form urea
B) synthesizing ammonia from uric acid
C) excreting urea
D) producing urea from uric acid and carbon dioxide
Answer: A
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The C domain of antigen-binding proteins functions to
A) attach the antigen-binding domain to the cytoplasmic membrane. B) bind to the cytoplasmic membrane of foreign cells. C) complex multiple antigen-binding proteins together. D) bind to epitopes.
The enzyme reverse transcriptase was discovered by
A. Arber and Smith. B. Temin and Baltimore. C. Jackson, Symons, and Berg. D. Boyer and Cohen.
Many organisms used in modern agriculture are a result of artificial selection
Indicate whether the statement is true or false
The main difference between protonephridia and metanephridia is that:a
protonephridia are involved in osmoregulation, while metanephridia are involved in excretion. b. protonephridia consist of blind flame cells, while metanephridia consist of tubules open at both ends. c. protonephridia are involved in excretion, while metanephridia are involved in osmoregulation. d. protonephridia consist of tubules open at both ends, while metanephridia consist of blind flame cells. e. protonephridia are found in annelids and metanephridia are found in flatworms