Q: Why is it hard to create a timeline of events chronicling Earth’s History?
A: There are timeliness but they are often conjectured and who can argue with them with an alternative.…
Q: Why are the two great oxygenation events in the earth’s atmosphere seen as key prerequisites for the…
A: The two great oxygenation events or oxygen revolution was a time period when earth's atmosphere and…
Q: Chronologically arrange the evolutionary events of life’s origin on earth with 1 being the earliest…
A: Evolution of life explains how living things are changing today and how modern living things have…
Q: The oxygen revolution permanently changed Earth’s environment and dramatically impacted the…
A: We are answering first 3 questions. For rest of questions pls repost. Oxygen evolution is a…
Q: Explain why it is difficult to use carbon-14 dating on 100-million-year-old dinosaur fossils
A: Carbon dating is a technique used for the determination of the age of an object which contains…
Q: Analyze the following data table indicating the amount of Carbon Dioxide in Earth's atmosphere at…
A: Earth`s temperature is in direct correlation with the levels of CO2 which is the primary greenhouse…
Q: Explain how events that unfolded 55 million years ago can guide understanding the present…
A: About 55 million years ago, the world was the hothouse earth. It was during the Eosine-epoch period.…
Q: Explain the consequences of plate tectonics for lifeon Earth.
A: The continents form a part of the floating plates of the crust of the earth. Movements of the mantle…
Q: During the first 600 million years of Earth history, enzymes, ATP , and other molecules could have…
A: The primitive earth was in the form of a red hot, solidified cloud containing free atoms. The…
Q: Which of the following eras in Earth's history is the longest? Precambrian Cenozoic Paleozoic…
A: A geological era divides eon into smaller unit of time. Geological era are further divided into…
Q: Describe the evolutionary significance of the Cambrian explosion.
A: Introduction Cambrian explosion event was occurred nearly 541 million years ago during the Cambrian…
Q: Describe how the sudden appearance of oxygen in the atmosphere about 2.5 billion years ago…
A: Since life first emerged on Earth between 3.5 and 4 billion years ago, it has continued to develop.…
Q: Give two lines of evidence supporting the asteroid impact hypothesis for the Cretaceous extinctions.
A: The evidence is given below.
Q: Which of the mass extinctions was the largest? What percentage of life went extinct during that…
A: Mass extinction is defined as the dis-appearance of a large scale of biodiversity (animals +plants…
Q: What does Oparin-Haldane Hypothesis assume about Earth’s primordial atmosphere? Why would this have…
A: Oparin-Haldane Hypothesis -Oparin-Haldane Hypothesis showed that how complex biological molecules…
Q: Around the time Eukaryotic Cells began to compartmentalize their reactions, and the chloroplast and…
A: Introduction Origin of life on earth can be traced back to 3.4 billion years ago and as we now know…
Q: What patterns can be compare to the mass Extinctions events?
A: Mass extinctions are followed by the pattern : Adaptive Radiation Increasing Earth's Biodiversity.
Q: Imagine you were to find a fossilized animal bone containing one-eighth the amount of carbon-14…
A: Given information: Carbon-14 present in the fossil is 1/8th of the earth's atmosphere today. The…
Q: Describe human adaptations to climate. And to ultraviolet radiation.
A: Adaptation is a biological process which provides rhe organism to survive in response to the…
Q: How the evolution of oxygen was involved in the initial evolution of terrestrial life
A: Photolysis of water vapors and carbon dioxide produce hydroxyl and oxygen, individually, thus, they…
Q: On the geologic time scale, life originated in the_____ . a. Archean c. Phanerozoic b. Proterozoic…
A: The geologic time scale is a chronological dating system that classifies geological strata into…
Q: State in what ways Stanley miller simulated the condition of :-i) Primitive atmosphere on earth.ii)…
A: Stanley miller performed an experiment to prove that organic molecules were produced by the…
Q: Compare and contrast the physical and chemical conditionson Earth at the time life first arose with…
A: Earth is a planet which supports numerous life system and abiotic factors. Earth formed 4.5 billion…
Q: How could the biological carbon cycle have worked on the primitive Earth, where oxygen gas was…
A: Introduction : The balance of the nutrients in the biosphere makes life sustainable. The movement of…
Q: List several significant events in the history of life on earth that are associated with the K-T…
A: KT boundary is the boundary between the age of reptiles that occurred in the Mezoxoic era and age of…
Q: Cambrian explosion occurred?
A:
Q: Life originated from the earth’s inorganic atmosphere in the post, but this no longer happens today.…
A: Theories from various scientists propose that in Earth's prebiotic history, simple organic matter…
Q: Explain what significant events happened during the Five major extinction events between the late…
A: An extinction event (also recognized as a mass extinction) is a large-scale and sudden loss of…
Q: What was the composition of the earth’s atmosphere at the time of the origin of life, and how did it…
A: Earth was originally in the molten lava state mainly consists of hydrogen sulfide and other…
Q: Explain in detail the usefulness of the atmospheric layers to humans
A: Atmosphere is the blanket of air which surrounds the earth . It helps support life on earth .
Q: “Life has profoundly changed the Earth.” Explain whether or notthese experimental results support…
A: The earth was formed about 4,570 million years ago and over the passage of time, different…
Q: Describe one of the major extinction events during the Late Paleozoic or Mesozoic (include when it…
A: Description of the major extinction event occurred in late paleozoic Or medozoic era.
Q: Most people tend to think that if the sun ever stopped emittinglight, all animal life on Earth would…
A: An animal varieties or species is regularly characterized as the biggest gathering of organisms…
Q: Explain the unusual observations Walter Alvarez made in the Scalgia rossa formation in Umbria.
A: Walter Alvarez was born and raised in Berkeley, attended Carleton College in Minnesota, and received…
Q: Assuming that the early lithosphere had already been created, which sphere (the atmosphere or the…
A: Introduction The Stiff, Outermost Shell Of A Terrestrial-type Planet Or Natural Satellite Is Called…
Q: n Stanley Miller’s experiment to recreate the early Earth conditions that gave rise to life,…
A: The Stanley miller's experiment is also called miller-Urey experiment. It was a chemical experiment…
Q: Describe the roles that montmorillonite clay and vesicles may haveplayed in the origin of life.
A: The origin of life (OoL) on Earth is a natural mechanism. Life conquered the Earth about 3.7 billion…
Q: Which staterment from the choices below, BEST describes scientists current understanding of the…
A: Methane, ammonia, water vapour, and the noble gas neon were abundant in Earth's initial atmosphere,…
Q: Explain how carbon isotopic signatures can be used to determine diets of extinct organisms.
A: Carbon isotopic signatures can be used to determine diets of extinct organisms. They are used…
Q: Describe the two principal factors that in combination determine whether an exoplanet is likely to…
A: Earth is the only planet at present that has habitable conditions required for sustenance including…
Q: True or false. The supercontinent pangaea formed about four billion years ago.
A: A supercontinent is a landmass that contains most or all of the land on Earth. The landmass formed…
Q: A. How old is the Earth? B. How long did the longest eon (so far) last? C. How many years ago did…
A: Epoch is longer than era. Eon is the longest period of geological time.
Q: List three locations where the building blocks of Earth’s first lifemay have formed
A: The biological event through which life has originated from non-living matter, like simple organic…
Q: Based upon our current understanding of the abiotic origin of life, which of the following molecules…
A: Abiogenesis is the generation of life from nonliving matter. It is now more precisely known as…
Q: Which of the following did not contribute to Earth's present atmospheric concentrations of oxygen…
A: *Atmosphere is a layer of gases which is held by gravity of the planet body. *planet retains…
Q: Discuss how excess carbon dioxide lead to a mass extinction in the Permian period.
A: A mass extinction event is when species disappear a lot quicker than they are replaced. This is…
Q: Describe the conditions on Earth 4.5 billion years ago
A: Evolution is the process of slow gradual change over a period of time. The process of evolution…
Q: Describe the evidence for the cause of the Cretaceous–Paleogene (K–Pg) mass extinction.
A: the K–Pg extinction was caused by the impact of a massive comet or asteroid 10 to 15 km (6 to 9 mi)…
Q: Describe in general terms how the appearance of molecular oxygen in Earth’s atmosphere about 3…
A: The earth was created almost 4.5 billion years ago. The evidence suggests that the planet was devoid…
Q: How do we know when oceans were first present on Earth?Why is the presence of oceans significant to…
A: The water body, which consists of hydrosphere of different planets, is called oceans. The 71%…
Explain why the Oxygen (3800-3500 million years ago) is important and elucidate the impact of that event in todays’ living organisms.
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Solved in 2 steps
- Describe in general terms how the appearance of molecular oxygen in Earth’s atmosphere about 3 billion years ago affected the history of living organisms.Describe how the sudden appearance of oxygen in the atmosphere about 2.5 billion years ago influenced the development of modern life-forms.Scientist have determined that the early Earth had no free oxygen anywhere. Briefly explain what evidence in the rock layers that scientists found to prove when the early conditions on earth had free oxygen in the atmosphere.
- How the evolution of oxygen was involved in the initial evolution of terrestrial life?Why are the two great oxygenation events in the earth’s atmosphere seen as key prerequisites for the development of Eukaryotic life and later Multicellular life?Before the emergence of life of what gases was the earth's primitive atmosphere constituted?
- State in what ways Stanley miller simulated the condition of :-i) Primitive atmosphere on earth.ii) Energy source at the time of origin of life .iii) Formation of organic molecule of life.Describe the conditions on Earth 4.5 billion years ago“Life has profoundly changed the Earth.” Explain whether or notthese experimental results support this statement.
- The numbers of the bottom of the chart represents the number of years. What do you think is/are the reasons on the rise and decline of oxygen levels on earth as years go by?Understand the importance of the Miller-Urey experiments that recreated the conditions present in early earth and caused organic molecules to form spontaneously.Describe one of the major extinction events during the Late Paleozoic or Mesozoic (include when it happened, what caused it and what groups of organisms went extinct).
