In science, all results
a. are accepted as fact.
b. are only hypotheses.
c. have a probability of being incorrect.
d. must be consistent with previous
knowledge.
e. are uncritically accepted by other scientists
C
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Which of the following hypotheses relies on the chemical reaction between hydrogen sulfide (HS2) and iron (Fe) for the built up of a H2 concentration gradient to provide the necessary energy for the reduction of N2 to NH3?
A. Reducing Atmosphere Hypothesis. B. Extraterrestrial Hypothesis. C. Deep-Sea Vent Hypothesis. D. Both Reducing Atmosphere and Extraterrestrial Hypotheses. E. All three hypotheses use this exact reaction to create a chemical gradient to form amino acids.
What is the process in which impulses jump from node to node?
A. facilitated transmission B. refractory action C. incomplete transfer D. repolarization E. saltatory conduction
Simple sugars like glucose can be detected and measured using orcinol
a. True b. False
Blood passing through the capillary beds of the digestive tract pass through which vessel that takes
blood to the liver? a. inferior vena cava b. abdominal aorta c. hepatic portal vein d. hepatic artery e. hepatic vein