In their laboratory experiments of simulations of early Earth, Miller and Urey observed the abiotic synthesis of abundant amounts of DNA amino acids liposomes genetic systems Which of the following was probably NOT present in the primitive Earth s atmosphere (when life first appeared)? O2 NH3 H2O CH4 CO2

In their laboratory experiments of simulations of early Earth, Miller and Urey observed the abiotic synthesis of abundant amounts of DNA amino acids liposomes genetic systems Which of the following was probably NOT present in the primitive Earth s atmosphere (when life first appeared)? O2 NH3 H2O CH4 CO2

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

10th Edition

ISBN:9781305967359

Author:STARR

Publisher:STARR

Chapter18: Life's Origin And Early Evolution

Section: Chapter Questions

Problem 1SA: An abundance of___________ in Earths early atmosphere would have prevented the spontaneous assembly...

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Which molecule is believed to have preceded the other two during the evolution of life? RNA Proteins DNA
A)The Miller-Urey experiment in 1953 proved that Group of answer choices multicellular organisms can evolve from unicellular ones living cells could arise from non-living substances organic molecules important to living things could form from a "hot soup" of simple substances conditions on early Earth were not as inhospitable as biologists of the time generally believed a source of energy was not required in order for life to develop on Earth
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Approximately how long ago did homo sapen (humans) first appear on Earth 2,000 years ago 5-7 million years ago 65 million years ago 150,000 - 200,000 years ago Hominins developed their unique larger brains before acquiring the ability to move on two feet. True False the production of atmospheric oxygen in Earth's environment started with photosynthesis by prokaryotes photosynthesis by multicellular eukaryotes photosynthesis by single celled algae photosynthesis by land plants Homologous structures among animal provide evidence for evolution in that theses structure are all produced by the same gene different in different animals, but are modifications of the same basic structure similar in function, but of different basic structure all different structures within the same species
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!
Stanley Miller and Harold Urey provided the first experimental evidence that . Group of answer choices Inorganic molecules could be created from organic precursors Darwin's theory of evolution by natural selection could be correct Organic molecules could be created from inorganic precursors The atmosphere of Early Earth contained inorganic molecules
Which of the following questions about the origin of life on Earth is most scientifically testable? * Why were the earliest life-forms created using only twenty amino acids? Did life originate to make the universe a better place? Was catalytic RNA used by ancient organisms as a stepping stone to acquire protein enzymes? Can simple organic molecules form spontaneously in an oxygen-free atmosphere?
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 prokaryotes
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 29 27 28 30 330 29 29 30 Based on the given figure, answer the following questions (Note: BYA=Billion Years ago; MYA= Million years ago) The oldest eukaryote might be dated back to? Each day represents how many years? When did the first prokaryotic fossil exist? When did photosynthesis first emerged? The multicellular organisms appeared? ~1.5 BYA ~2.5 BYA ~10 BYA ~3.5 BYA ~150 MY ~50 MY ~1 MY ~4.5 MYA ~ 10 MYA ~1 BYA
One of the prerequisites for chemical evolution on early Earth is that there was an adequate amount of time. This is an irmportant assumption because there had to be enough time for which of the following to occur? * RNA needed to start catalyzing reactions. The sun needed to begin to produce infrared radiation. O Molecules needed to form, react, and reform. Oxygen needed to leave the atmosphere.