Darwin's ideas on evolution were advanced for his time. His approach to science and natural selection were supported by what main tenet?
A. Species were unchangeable over the course of time.
B. Operation of natural laws produces constant change and improvement.
C. Various organisms and their structures resulted from a spontaneous action.
D. The world is fixed and constant.
B
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Common alleles of genes other than BRCA1 ____
a. dictate the types of mutations that occur in BRCA2 b. cause uncontrolled division of the BRCA2 gene c. cause the interruption of the cell cycle in any cell containing a BRCA2 mutation d. have a strong influence on whether a carrier will develop breast cancer e. have very little influence on whether a carrier will develop breast cancer
Which of the following is among the results of nondisjunction?
a. a change in the status of a daughter cell from diploid to haploid b. a failure of spindle fibres to separate a homologous pair of chromosomes c. one pole receiving neither member of a homologous pair of chromosomes d. a change in the status of a daughter cell from haploid to diploid
The Western Blot technique detects
A. proteins. B. specific genetic marker sequence on genes. C. recombinant DNA. D. DNA. E. RNA.
Polyomaviruses
A. cause common asymptomatic to mild infections. B. include the JC virus and BK virus. C. cause progressive multifocal leukoencephalopathy. D. cause problems in renal transplant patients. E. All of the choices are correct.