24. The authors attitude toward the theory of a cold pre-history of life can best be described as
neutral
skeptical
mildly positive
very supportive
pointedly critical
25. The authors hypothesis concerning the cold prehistory of life would be most weakened if which of the following were true?
Cosmic rays are unlikely to trigger the formation of simple molecules.
Tunneling occurs only in a narrow band of temperatures around zero degrees Kelvin.
The synthesis of interstellar formaldehyde can be activated by means other than cosmic rays.
Simple molecules can be synthesized by means of tunneling.
Classical chemical reactions do not occur at temperatures close to absolute zero.
26. Which of the following best describes the hypothesis of Hoyle and Wickramasinghe as it is presented in the passage?
Cosmic rays can directly synthesize complex organic molecules.
The galactic clouds are the places where prebiological evolution of compounds necessary to life occurred.
Interstellar formaldehyde can be synthesized by tunneling.
Molecules of interstellar formaldehyde can evolve into complex organic molecules.
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