Which of the following best describers the reduction of the coenzyme NAD?
What will be an ideal response?
NAD+ + H -> NADH
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Prokaryotes are the only organisms able to use atmospheric nitrogen as a nitrogen source
Indicate whether this statement is true or false.
When is an experiment considered to be double-blind?
A) The hypothesis being tested is not based on previous observations. B) It has already been performed by different researchers. C) Neither the subjects nor the researchers know who is in the experimental and control groups. D) The results of the experiment are only revealed to certain researchers.
Noneukaryotic cells have
A. chloroplasts. B. ribosomes. C. endoplasmic reticulum. D. nuclear membranes.
Darwin realized that most species produce many more offspring than is necessary to maintain a constant population. The "excess" individuals in a population
A) mutate and are able to adapt to new environments. B) die before they can reproduce. C) evolve to become new species. D) migrate to another location.