What was the evolutionary significance of Georges Cuvier's analysis of the fossilized Irish elk, published in 1812?
What will be an ideal response?
Cuvier's analysis demonstrated that extinction had a significant role in evolution, and showed that the Irish elk belonged to a lineage that had become extinct, and was not related to any other extant species such as moose or reindeer.
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Which type of microscopy enhances and amplifies slight changes in the phase of transmitted light?
A) differential interference contrast microscopy B) digital video microscopy C) fluorescence microscopy D) phase-contrast microscopy E) both choices A and D
A frequent complication of untreated gonorrhea in women is
A. pelvic inflammatory disease. B. syphilis. C. dysuria. D. vaginal discharge.
How do transcription repressors work?
a. They bind to the same sequence where activators normally bind. b. They bind to and disable the activator. c. They recruit histone acetylation enzymes and thus interfere with chromatin remodeling. d. They bind to RNA polymerase II and prevent it from binding to the transcription factor complex e. They methylate DNA.
Which of the following technologies uses electricity to sort DNA fragments based on their sizes?
A.) genetic screening B.) gel electrophoresis C.) DNA microarrays D.) genetic engineering