Microorganisms are essential to our life. Each of the following is an example of a beneficial function of microorganisms EXCEPT
A) alternative fuel production.
B) bioremediation.
C) gene therapy.
D) agriculture.
E) increased number of illnesses.
E
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Which of the following statements about genomic libraries and cDNA libraries is TRUE?
A. a cDNA library is derived from chromosomal DNA. B. a genomic library is derived from mRNA. C. a genomic library is made using reverse transcriptase. D. a genomic library is derived from mRNA and is made using reverse transcriptase. E. a cDNA library is derived from mRNA and is made using reverse transcriptase.
Which of the following animals has an incomplete digestive system?
a. bird b. flatworm c. goat d. amphibian
In which blood vessels do the exchange of gases and other materials occur?
A) arteries B) veins C) capillaries D) right atrium
The ends of chromosomes are called ________.
A. caps B. telomeres C. centromeres D. DNA termini