Which of the following is NOT a cause of mutation?
A. Errors in DNA replication
B. Errors during meiosis
C. Exposure to radiation
D. Exposure to tobacco
E. All of the choices are causes of mutations.
E. all of the choices are causes of mutations
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Which of the following is/are true about endotoxins?
A. Lipid A is the toxic portion of the molecule. B. The toxic effects depend on the bacteria from which it came. C. The lipid A is immunogenic. D. They are proteins. E. The toxic effects depend on the bacteria from which it came AND they are proteins.
Fishing populations to low levels can cause a species to
a. relocate to distant locations. b. migrate out of the area. c. switch their prey items. d. become ecologically extinct. e. increase its reproductive rate.
In simple diffusion substances will move from an area of high concentration to an area of low concentration
1.True 2.False
A DNA molecule is considered antiparallel because the sugar-phosphate groups that are chained together to make each strand are oriented in opposite directions.
Answer the following statement true (T) or false (F)