Before Muller's discovery that radiation induces mutation, scientists had to work on mutations that were found solely by phenotype differences in natural populations
Which of the features of Drosophila made it a fortuitous choice for Morgan and his colleagues? A) having a long life cycle
B) especially high rate of mutation
C) large number of easily visible phenotypes
D) well-known biochemical pathways
E) the number of genes with only two alleles
C
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Macromolecules that are used by most organisms to store hereditary information are called:
A. proteins. B. transfer RNA molecules. C. ribosomal RNA molecules. D. DNA molecules. E. messenger RNA molecules.
In the lac operon, cAMP binds to:
a. DNA. b. the repressor gene. c. the operator gene. d. the repressor protein. e. catabolite activator protein.
Suppose a biologist can separate one of a dozen pieces of chromatin from a eukaryotic (animal) nucleus. It might consist of which of the following?
A) one-twelfth of the genes of the organism B) two chromosomes, each with six chromatids C) a single circular piece of DNA D) two long strands of DNA plus proteins E) two chromatids attached together at a centromere
The Equator Principles:
A) divide projects into high, medium, and low social and environmental risk and compel borrowers to meet standards for ecological protection and to consult with native peoples. B) are intended to set the world standard for those wanting to invest in companies following "good standards of corporate responsibility." C) are standards that rise above legal requirements for environmental performance in European nations. D) produce one of the world's most prevalent standards for sustainability reporting.