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?

Q: When did photosynthetic organisms first appeared? O From the very beginning of life, they are some…

A: Photosynthetic creatures, also called photoautotrophs, are photosynthesis-capable organisms. Higher…

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: Question attached

A: The cosmic rays are absorbed from the atmosphere which converts the nitrogen 14 to carbon 14. Carbon…

Q: Question 1:  Mass extinction ocurred on the following time and era except for: A. Mesozoic B.…

A: Question 1) Mesozoic era : At the end of this era the about 70% of all plants and animals were…

Q: Many scientists claim that the synthesis of the first organic molecules from inorganic precursors…

A: Null hypothesis is a statement which is based upon certain observations and facts.

Q: Which of these did Stanley Miller place in his experimental systemto show that organic molecules…

A: Answer- S.L. Miller experiment concluded the thoery of chemical evolution. He used all the inorganic…

Q: These are one of the most important fossil record of the early life forms here on Earth and formed…

A: Q.These are one of the most important fossil record of the early life forms here on Earth and formed…

Q: It is likely that the first organisms on Earth were heterotrophs that obtained energy through animno…

A: The first organic molecules formed about 4 billion years ago. This may have happened when lightning…

Q: Investigate and describe how prokaryotic cells photosynthesize without having chloroplasts.

A: This answer is for the first part of the question. In order to get the answer to the second part of…

Q: The researchers found that the Neanderthal fossil had approximately0.0078 as much 14C as found…

A: a. The half live can be calculated  using the formula- N=N0(1/2)n where, n = number of half lives,…

Q: In the geologic time scale, there is a large delay between the evolution of photosynthetic bacteria…

A: Option (A) is correct option . The evolution  of photosynthetic bacteria occured 3.4 billion years…

Q: Which of the following events occurred earliest in Earth’s history? a. Membrane-enclosed structures…

A: Recognizable human beings appeared on a geological scale at most 2 million years ago, a vanishingly…

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 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: Question: Which of the following puts the events in the history of life in the correct order?

A: Extinction  The process in which particular organism disappear from the earth and nowhere to be…

Q: Before the emergence of life of what gases was the earth's primitive atmosphere constituted?

A: the primitive atmosphere was reducing in nature it had little or no oxygen  it was rich in water…

Q: Earth’s biota were believed to be relative simple, slow-metabolizing life. During what era is this?

A: There is  a significant change in the earth's atmosphere and the evolution of animals has made it…

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: Volcanic ash can be used to date fossil finds because each time it is expelled by an eruption it has…

A: The answer is True

Q: The unicellular cyanobacterium Prochlorococcus sp. is the most abundant photosynthetic microbe in…

A: Prochlorococcus are green, small, and unicellular bacteria having chlorophyll a and chlorophyll b…

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: 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: The current geological era is the ________.   Question 32 options:   Cambrian   Paleozoic…

A:

Q: Cambrian explosion occurred?

A:

Q: Why was it believed that life began in the seas and not in land or air? * Land and air were…

A: Option a is correct  Land and air were inhospitable places for life during the archean eon.

Q: Which staterment from the choices below, BEST describes scientists current understanding of the…

A: Answer: THE ORIGIN OF LIFE ON EARTH was started around 3.8 billion years ago. and this was difficult…

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: The animals body plans that emerged from the Cambrian Explosion were multi-cellular and…

A: Originally, geologists identified the start of the Cambrian Period as the first appearance of…

Q: Earth’s biota were believed to be relative simple, slow-metabolizing life. During what period is…

A: Biota- The different sorts of plant and animal life that can be found in different areas at…

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: Based on what geologists have learned about Earth history, levels of oxygen in Earth's ancient…

A: Glycolysis is the process in which glucose is converted into pyruvate by a 10 step process and every…

Q: Given that the early atmosphere did not contain oxygen gas, using only the information covered in…

A: Photosynthesis is a process that occurs in plants and also other organisms such as fungi, bacteria,…

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: Studying the decay of radioactive isotopes in dead organisms helps scientists to identify fossilized…

A: In the decay of radioactive isotopes after the death of an organism, there is radioactive…

Q: Approximately how long ago did homo sapen (humans) first  appear on Earth 2,000 years ago 5-7…

A: Homo sapiens are the species to which all modern human beings belong. The average brain mass of H.…

Q: Which of the following lineages forms it's protective structures from silica dioxide and is…

A: Diatoms are a very small marine organism that is responsible for the production of 40-45% of the…

Q: Most of the ATP created during aerobic cellular respiration occurs along the cristae of the…

A: The aerobic cellular respiration involves oxidation of glucose to release energy in the form of ATP.…

Q: Why did the evolution of multicellular organisms such as plants and animals have to be preceded by…

A: evolution is a process or a theory that describes how the organisms developed from simple organic…

Q: (Modified True or False) Fossilized organisms are forms of organic carbon that are buried and stored…

A: A fossil is a preserved remains of animals and plants that are buried in sediments.  It is formed…

Q: How does the ocean remove carbon dioxide from Earth’s atmosphere? What role do tiny marine…

A: The oceans store a large amount of green house gases and carbon dioxide within them. The carbon…

Q: Scientists are examining the possible role of a large asteroid in the cretaceous mass extinction…

A: Introduction :  Small, airless rocky bodies revolving around the sun between the orbits of Mars and…

Q: Explain why the Oxygen (3800-3500 million years ago) is important and elucidate the impact of that…

A: Life originated around 4 billion years ago in the deep-sea hydrothermal vents and around 3.6 billion…

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: 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: Scientists are examining the possible role of a large asteroid in the Cretaceous mass extinction…

A: ANSWER;- OPTION  C is correct ( after the asteroid strike).

Q: Explain what caused the increase in oxygen in Earth’s air andwaters

A: Answer :- The atmosphere of the Earth contains around 78 percent nitrogen and 21% oxygen. There are…

Prokaryotic evolution

The term evolution means the gradual change or a transformation from a simple or primitive state to a complex or advanced state. Prokaryotic evolution is a concept that involves the evolution of the form and function of most primitive organisms (prokaryotes) through several stages and changes to form diverse life as a part of organic evolution.