Examine the phylogenetic tree depicted in Figure 26.17 as you address the following questions. The Crenarcheota, Korarchaeota, and Thaumarchaeota are three divisions within the Archaea that share a common ancestor
A. true
B. false
A
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Which of the following may be used as sources of energy by chemolithotrophs?
A. Reduced nitrogen compounds B. Reduced sulfur compounds C. Hydrogen gas D. All of the choices are correct.
Which of the following is NOT an example of macroevolution?
A. One species of birds evolves feathers. B. One species of birds evolves into many species of birds. C. One species of dinosaurs evolves into the first mammal. D. One species of mammals evolves into a new species of mammal. E. All answers are correct.
What does the conjugated system arrangement in pigments result in?
a. delocalization of protons b. localization of electrons c. delocalization of electrons d. localization of protons
The process of using two regressions to measure the causal effect of a variable while utilizing an instrumental variable is known as:
A. difference in difference. B. probit. C. nonlinear least squares. D. two-stage least squares.