The half-life of 14C is 5,730 years. If, after 11,460 years, an organism dies, what percent of the initial 14C will still be present in the organism's bones?
A. 75%
B. 0%
C. 25%
D. 100%
E. 50%
C. 25%
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Conjugation is a process by which the bacterial cells
a. contact each other using a sex pilus to obtain new alleles. b. contact each other for gratification purposes. c. disrupt each other d. are infected with virus e. a bacteriophage carries DNA from one bacterium to another.
Sympatric speciation through polyploidy has been a frequent phenomenon in the evolution of
a. insects. b. mammals. c. bacteria. d. plants. e. fish.
Why are bacterial decomposers important?
a. Most cause disease. b. They produce spores. c. They fix nitrogen. d. Common in biotechnology. e. They break down complex organic molecules in wastes and remains.
Today, most monoclonal antibodies are
a. produced using genetically altered bacteria. b. collected from mice. c. collected from sheep. d. collected from horses. e. produced using human subjects.