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Which molecule is believed to have preceded the other two during the evolution of life?
RNA |
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Proteins |
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DNA |
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- Based on genes from mitochordrial DNA the most accepted tree of life includes three domains. Eukaryotes and archaea are most closely related to each other than either are to bacteria. MRNA rRNA TRNA 0000What is the origin of life or the main ancestor of all organismsWhich molecule -DNA or RNA- do scientist believe was found in the first life form on Earth? Why do scientist believe this molecule was first to form life?
- Why is RNA likely to have been pivotal in life’s beginnings?Which of the following occurred first in the history of life on earth? Colonization of land Evolution of photosynthesis Origin of unicellular eukaryotes Origin of multicellular eukaryotes Origin of prokaryotesSelect the false statements from the following regarding the RNA hypothesis of chemical evolution. RNA are diverse molecules in the modern cells able to provide genetic instructions while catalyzing anabolic and catabolic reactions. RNA is not able to hydrogen bond to itself. DNA became a storage molecule after ancestral RNA mutated to a double helix. Enzymatic RNA are thought to have produced the first proteins in evolution.
- What are the eons in which the following events occur? Origin of Earth. Oxygen appeared in the atmosphere Prokaryotic cells Single cell eukaryotes Multicellular eukaryotes Animals PlantsSimple systems (of this type) of RNA , enzymes, and coenzymes have been created in the laboratory. Which probable stage of physical and chemical evolution of life is that.Scientists Stanley Miller and Harold Urey set up an experiment modeling the environmental conditions thought to exist during the early stages of Earth's formation. The setup of Miller and Urey's experiment is shown below. Which conclusion about the origin of life could be drawn from the potential results of this experiment? Life assembled from chemical building blocks. Life began when water vapor became electrified. Life evolved from the DNA of simple unicellular organisms. Life began when salt water caused a mutation in an ancient virus.
- Which of the following is not a reason why RNA is expected as one of the first primary molecules in the earliest living life forms? RNA can self replicate with errors which will lead to selection RNA can perform work on other molecules RNA can store information RNA uses uracil which is more stable than the other nucleotidesWhich of the following are considered emergent properties of life? Check all that apply. Electrons in a carbon atom Reflexes Release of energy from glucose during metabolism Three-dimensional structure of different DNA sequences Three-dimensional structure of different protein sequencesWhich theory of the origin of life do you think is most possible? Why?