In a famous experiment, Miller and Urey discovered that organic molecules could form under the conditions believed to be characteristic of early Earth. About 50 years later, a student of Miller's reanalyzed a sample from the experiment. Which of the following best describes what resulted from this? A) More complex organic macromolecules were found, further supporting the idea that evolution of life occurs over a long period of time.
B) More organic compounds were found and analyzed, and results suggest that abiotic synthesis of organic compounds took place near volcanoes.
C) The sample contained aerobic microorganisms, supporting the idea that the amount of atmospheric oxygen on Earth has increased over time.
D) The sample contained only inorganic molecules, suggesting that the original sample either decomposed over time or was originally contaminated.

This map shows how climate change might affect precipitation patterns in the great plains of the united states by the end of this century. brown shoes a decrease in percipitation, and blue shows an increase. the maps differ based on the predictive levels of green house emissions. the maps shows that northern area should get a. more pracipations regardless of emmissions b. less pracipation, regardless of emmissions levels c. more precipitation, but only when emission levels. southern areas show a. more pracipations regardless of emmissions b. less pracipation, regardless of emmissions levels c. more precipitation, but only when emission levels. to use these maps to prepare for natural disasters in the great plains, scientist need to ask? a. how many tons of emissions were used at the basis of the map. b. which types of fossil fuels are used in the great plains c. if you think the above is wrong it's probly c the question is cut off

What is gene expression control that occurs after the generation of rna

Imagine a self-reactive t cell that has not undergone clonal deletion in the thymus (that is to say, it has escaped central tolerance). if it encounters self antigen in the absence of an infection or inflammation, what will happen to this self-reactive t cell? (select two answers) (a) the t cell undergoes clonal expansion. (b) the t cell gains effector functions. (c) the t cell undergoes apoptosis. (d) the t cell becomes activated. (e) the t cell becomes anergic.