The approach known as catastrophism explains Earth's geological features appealing to:
a. sudden catastrophic geological events.
b. large-scale geological events.
c. the same geological processes currently observable.
d. A and B.
D
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What is the function of the ? subunit of E. coli RNA polymerase in transcription?
A. It contains the polymerase active site. B. It contains the separate exonuclease site required for proofreading. C. It directs the polymerase to bind a specific type of promoter sequence. D. It signals the polymerase to terminate transcription at specific sites. E. It allows template-independent RNA synthesis.
Stem cells that can differentiate into any type of tissue but cannot differentiate into a complete organism are ______________ cells
A. totipotent B. pluripotent C. unipotent D. None of the choices is correct.
What species of hominin created the cave paintings at Lascaux, France?
A) Australopithecus robustus B) Homo habilis C) Homo erectus D) Australopithecus afarensis E) Homo sapiens
A control variable is a variable included in a regression equation whose purpose is to:
A. improve the fit of the model. B. provide a placebo test. C. ensure the sample is representative. D. alleviate an endogeneity problem.