El Niño is a recurring weather phenomenon that leads to increased ocean temperature in the Pacific, and thus ____.
A. increases global warming
B. stabilizes world climates
C. increases the incidence of cholera
D. depletes the ozone layer
E. increases oceanic productivity
Answer: C
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The polymerase chain reaction is used to
A. amplify certain sections of DNA. B. amplify mRNA. C. produce proteins. D. produce long polymers of carbohydrates to be used in electrophoresis.
Which of the following defines epigenetic gene regulation?
a. regulation when the DNA is uncoiled and loosened at the nucleosomes to bind transcription factors b. regulation after translation c. regulation when RNA is processed and exported to the cytoplasm after it is transcribed d. regulation when RNA is translated to protein
"Robust australopithecines," now classified in the genus Paranthropus, are distinctive as compared to other hominins because of their ________
A) great height B) unusually large brains C) knuckle-walking ability D) cave paintings and other artwork E) huge teeth, faces, jaws, and jaw muscles
Differences among species may relate to adaptation for the ability to exploit a certain environment or range of resources independent of competition
Indicate whether the statement is true or false