The Miller and Urey apparatus produced hydrogen cyanide (HCN), formaldehyde (CH2O), and glycine (an amino acid) in their first experiment, why was it important that they use water vapor, methane, carbon monoxide, ammonia and hydrogen as their reactants and an electrical spark as their energy source?
A. They knew these reactants were available in their lab and in today's atmosphere.
B. These reactants were found in today's atmosphere therefore they should be used to try to replicate the early Earth atmosphere.
C. Each of the reactants were readily changed into proteins and DNA.
D. These reactants were useful because their products were able to be predicted before the experiment began, it is always good to know the outcome of an experiment to achieve success with the experiment.
E. These reactants were hypothesized to have made up the early Earth atmosphere, the electricity was used to emulate lightening strikes.
E. These reactants were hypothesized to have made up the early Earth atmosphere, the electricity was used to emulate lightening strikes.
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The ATP generated from cellular respiration is not sufficient to drive the Calvin cycle in plants, even if appropriate levels of NADPH and CO2 are present. Why not?
A. Plants do not undergo cellular respiration B. Breaking down sugar to provide the energy needed to synthesize sugar would be a futile cycle C. The Calvin cycle requires more ATP than can possibly be made from cellular respiration D. Cellular respiration and photosynthesis do not happen in the same cells in plants Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about the Calvin cycle, photosynthesis, and cellular respiration in plants? What other information is related to the question? Choose Answer Do you have all the information need to determine why ATP from cellular respiration needs to be supplemented with ATP from the light reactions? Reflect on Process Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
____ square is a useful diagram to show the results of a F1 x F1 cross
Fill in the blank with the appropriate word.
The best-known extinction during which all dinosaurs died out completely occurred during the ________ time period
Fill in the blank(s) with correct word
One of the primary functions of RNA molecules is to _____
A) transmit genetic information to offspring B) function in the synthesis of proteins C) make a copy of itself, thus ensuring genetic continuity D) act as a pattern or blueprint to form DNA