Which of the following represent issues of great uncertainty regarding early Earth? Choose one or more: ✓ A. whether early life forms were thermophiles or psychrophiles B. whether first life was prokaryotic or eukaryotic C. whether life evolved here or was of extraplanetary origin D. whether first organisms were aerobes or anaerobes O E. role of methanogens and atmospheric methane
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- Which staterment from the choices below, BEST describes scientists current understanding of the conditions required for the origin of life on Earth? Earth's early atmosphere contained mos tly carbon dioxide. In addition, water vapor condensed and fell as rain forming pools Lightning provided the energy noeded for reactions an earth. Earth's early atmosphere contained mostly oxygen. In addition, there was no liquid water during this time. Lightring provided the energy necded for reactions on earth. O Earth's early atmosphere contained mostiy nitrogen. In addition, there was no liquid water during this time. Lightning provided the energy needed for reactions on earth O Earth's early atmosphere contained a mixture of gases. In addition, water vapor condensed and felI as rain forming pools. Lightning provided the energy needed for reactions on earthWhich of these did Stanley Miller place in his experimental systemto show that organic molecules could have arisen from inorganicmolecules on the early Earth?a. microspheresb. purines and pyrimidinesc. gases found in the atmosphere of early Earthd. only RNAe. All of these are correct.Studying the decay of radioactive isotopes in dead organisms helps scientists to identify fossilized remains. The ratio of C-12 to C-14 in the atmosphere is 1 x 1012. The table shows this ratio inside the body of three organisms. Organism C12/C14 Ratio E 8 x 1012 F 1 x 1012 G 4 x 1012 What can most likely be concluded from the above information? Only Organism F is alive, and Organism G died before Organism E. Only Organism F is alive, and Organism E died before Organism G. Only Organism E is alive, and Organism G died before Organism F. Only Organism E is alive, and Organism F died before Organism G.
- Here is the question: What was the likely source of the raw material incorporated into the first life forms? I believe it is carbon, but I don't know why it is carbon. What I mean is, why is carbon considered the thing that makes something alive? Why are eukaryotes and prokaryotes simply considered alive just because they have carbon. Would that mean that carbon is alive because carbon has carbon? I would appreciate an anwser because I'm really trying to understand everything I run across. I love educating myself and I'm on a quest for knowledge. Thanks guys!Rectangular Snip Which of the following is the common ancestor of organisms E, F, G, H? В E IV II H. LILAn abundance of___________ in Earths early atmosphere would have prevented the spontaneous assembly of organic compounds on early Earth. a. hydrogen b. methane c. oxygen d. nitrogen
- The oxygen revolution permanently changed Earth’s environment and dramatically impacted the evolutionary history that followed. Answer ALL the questions related to this phenomenon, below. Give the span of geological timewhen the oxygen revolution occurred. Provide oneline ofevidence for the oxygen revolution. What evolutionary novelty(complex metabolic pathway) enabled these new organisms to release so much O2? Organisms with what kind of metabolismprobably went extinctbecause of the oxygen revolution? What kind of metabolism, not possible before, likely evolved in responseto the oxygen revolution?According to the endosymbiotic theory, which of the following is NOT true about the evolution of life on earth? Eukaryotes and prokaryotes appeared at about the same time and evolved independently from each other. O None of the other four answers (all are true statements) Eukaryotes evolved from symbiotic prokaryotes living inside other prokaryotes Mitochondria and chloroplasts are in some ways similar to prokaryotes The first life on earth was simple organisms, similar to today's prokaryotesexplaination this in 150 words each question A. What is the PROTEROZOIC LIFE? B. Discuss the Great Oxygenation Event. C. Discuss the CAMBRIAN EXPLOSION OF LIFE.
- Which of the following statements about the current classification scheme for all life on this planet are true (note, there are more than one correct answer). O The closest relatives to the Animal Kingdom which includes humans are the Fungi OThe taxonomic system arranges organisms from the most primitive, like fungi and bacteria, to the most advanced, like humans O All life can best be separated into 3 Domains: Bacteria, Archaea and Eukarya O All life can best be separated into 5 main Kingdoms: Plants, Animals, Fungi, Bacteria and Protists O All life can best be separated into 6 main Kingdoms: Plants, Bacteria, Archaea, Animals, Fungi, Protists and Plants Show all Ailler Chapter 2.pdf 11:05 PM 1/17/2021 P Type here to searchWhich 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 prokaryotesThe Miller-Urey experiment simulated compounds present in the atmosphere of early Earth, lightning, and the evaporation and condensation of atmospheric water. What other information about the conditions on Earth during this time period would you want to know to improve the experiment
