You find a protist that has a single flagellum surrounded by a collar of microvilli. You correctly
conclude that this organism is:
a. a cellular slime mold.
b. a choanoflagellate.
c. a plasmodial slime mold.
d. not a unikont.
e. not motile.
B
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In individuals with type 2 diabetes, _____
a. blood sugar monitoring is not necessary b. diagnosis usually occurs very early in life c. diet is ineffective for managing the condition d. target cells do not respond to insulin e. little or no insulin is produced
In what way is artificial selection different from natural selection?
A) There's no difference; both have caused evolution throughout the history of life on Earth. B) Artificial selection applies to changes in domestic animals only, while natural selection applies to all other species. C) In artificial selection, human preference is the selecting force; in natural selection, environmental conditions are the selecting force. D) Artificial selection causes one species to change to another, while natural selection only modifies existing species.
What is the consequence of methylation of DNA sequences called CpG islands?
A. insulator sequence formation B. transcriptional stalling C. transcription repression D. active transcription E. recruitment of chromosome-remodeling complex
When the rodenticide warfarin was first introduced, rats were very susceptible to it. The development of resistance to warfarin by rats was the result of
A. the development of other blood clotting factors. B. natural selection of individuals that had a beneficial mutation. C. the high biotic potential of rodents. D. inheritance of acquired characteristics. E. mutation induced by warfarin.