Which domain of life contains the most multicellular organisms?
A. Archaea.
B. Bacteria.
C. Prokarya.
D. Eukarya.
E. microorganisms.
D. Eukarya.
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Recent studies have demonstrated evolution in some populations over a span of time as short as ____
a. single years b. decades c. centuries d. thousands of years e. millions of years
How are viruses used in gene therapy?
A.) to attack the immune system B.) to carry new genes into cells C.) to infect disease-causing bacteria D.) to kill cancer cells that have "suicide genes"
Bacterial IS elements contain
a. a gene for a repressor protein. b. inverted terminal repeats. c. a gene for an accessory protein needed for integration. d. a region with multiple short tandem repeats. e. direct terminal repeats.
The main purpose of a streak plate is to ______
a. grow many types of bacteria b. obtain mixed colonies c. seperate mixed bacteria into individual colonies d. make multiple cultures