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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.
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Q: What experimentation has been done on finding the source of raw material for the first life on…
A: Raw materials Raw material are the basic materials from which the things are made. Like raw…
Q: Was there molecular oxygen in the earth's primitive atmosphere? How has that molecule become…
A: Oxygen is one of the most important molecules or elements for all living organisms. It is…
Q: Chronologically arrange the evolutionary events with 1 being the earliest and 6 the most recent.…
A: Chronological event describe the timing of event as it occurred in the event of time period.…
Q: In the 1950s, scientists Miller and Urey conducted a classic experiment in which water, methane,…
A: Evolution is the study of origin of earth, origin of life on earth and relationship between…
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Q: Direct evidence of life on early Earth comes from fossils of microorganisms that lived 3.5 billion…
A: The earliest life structures we are aware of were minuscule organic entities (microorganisms) that…
Q: Why was the evolution of photosynthesizing bacteria important for the evolution of large,…
A: Cyanobacteria, which are capable of photosynthesis, are the general name for photosynthesizing…
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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: How can we use the structures that are involved with photosynthesis and cellular respiration to…
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Q: What are the ancestors of the chloroplasts in all plant cells? Ancient mitochondria Ancient…
A: Endosymbiotic theory is a theory that explains us how the eukaryotic cells are originated from the…
Q: How could the biological carbon cycle have worked on the primitive Earth, where oxygen gas was…
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Q: ich of the following questions about the origin of life on Earth is most scientifically testable? *…
A: Different theories have been put forward to explain the origin of life on earth. Some of those…
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: Enzymes are proteins, and therefore are structurally linked to DNA sequences. How could natural…
A: Proteins is made up of amino acids which are encoded by DNA strands. Mutation in DNA strand is…
Q: Why were cyanobacteria so important in the evolution of life onEarth?
A: Cyanobacteria is a known phylum that is known to contain the photosynthetic bacteria along with the…
Q: What evidence would you look for on Enceladus, Europa or Mars that would tell you that life may have…
A: Europa is the smallest of four Galilean moons orbiting Jupiter. Enceladus is the sixth-largest moon…
Q: What was the composition of the earth’s atmosphere at the time of the origin of life, and how did it…
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Q: Why is the advent of cyanobacteria considered a critical step in evolution?
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Q: The elements that present in Protoplasm Carbon, Hydrogen Carbon, Hydrogen, Nitrogen, and Oxygen…
A: The living organisms contain cells that are the smallest structural and functional unit of the body.…
Q: What are the 3 layers of the earth
A: The distance from beneath your foot to the center of the earth is approx 6,371 Km. The internal…
Q: Cyanobacteria was responsible for the increase in oxygen levels billions of years ago. They play a…
A: Answer : The Cyanobacteria were quite simple organism however carried out a crucial role in…
Q: Which of the following is true? A) Life originated around volcanic vents deep in the oceans. B)…
A: Abiogenesis is the theory that explains that life originated by the spontaneous process in hot…
Q: Have we identified all life on Earth
A: Biologists have described and classified 1.7 million plants and animals as of 2010, less than…
Q: What two pieces of evidence support the claim that all life on Earth descended from a common…
A: Evolution is the process by which the heritable traits of different organisms evolve over subsequent…
Q: Which of the following is not thought to have been a source of organic molecules on early Earth?* O…
A: Cosmic dust
Q: Why was it believed that life began in the seas and not in land or air?
A: Scientists believe that the life on the earth began in the depths of the ocean and not on the…
Q: Which of the following organisms appeared on earth first? Prokaryotes Eukaryotes…
A: Earth is considered to be the 4.5- 5 billions year old and is the habitat of vast form of lifes.
Q: Which of the following is the most probable order of appearance of molecules the evolution of life…
A: According to guidelines we have to answer the first question only. so please kindly post the…
Q: How have the earth and life on it evolved together with each deeply influencing the other?
A: The different varieties of animals, microorganisms, and plants are present on earth. All the…
Q: How would you describe earth of millions year ago
A: It is believed that our planet Earth is about 4.54 billion years old. About 3.5 billion years ago…
Q: where on the earth did life mostly likely first emerge, where all the ingredients and conditions for…
A: There is an evidence that life began as early as 4.5 billion years ago , and had been reported in a…
Q: How have changes in earths systems contributed to the evolution of life?
A: Earth and its environment are persistently modified. Plate tectonics move the landmasses, raise…
Q: How greatly do men cause Earth to change? Does it signify the start of a new epoch
A: Epoch is defined as the fixed point of time in history, which is established y the occurrence of…
Q: Origin of Life List in a series of four or five steps the most likely scenario for the evolution of…
A: Evolution is a continuous process and we are still evolving. Evolution is nothing but adapting to…
Q: Which of the following occurred first in the history of life on earth? Colonization of land…
A: In the starting phase of formation of the earth, the planet was filled by reducing gases that did…
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: How does evolution explain the biodiversity of life on earth
A: Biodiversity is the abundance and variety of life on the planet. It involves the different species…
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: Place the following events in the order in which they are thought to have occurred in early…
A: Evolution is a continuous process and we are still evolving. Evolution is nothing but adapting to…
Q: How does the autotroph hypothesis explain the origin of life?
A: Autotrophic hypothesis :- This theory states that first living organisms on earth were autotrophs…
Q: Why do we say that life is based on carbon
A: Carbon (from Latin word carbo meaning "coal") is a chemical element with atomic number 6 and the…
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%…
What is the name of the evolution where carbon, oxygen, nitrogen were formed?
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- 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 CO2What is the origin of life or the main ancestor of all organismsWhich 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?
- How the evolution of oxygen was involved in the initial evolution of terrestrial life?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 PlantsWhat evidence is there for the hypothesis that life originated on Earth by the creation and polymerization of small organic molecules by natural processes?
- Which molecule is believed to have preceded the other two during the evolution of life? RNA Proteins DNAAn 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. nitrogenWas there molecular oxygen in the earth's primitive atmosphere? How has that molecule become abundant?
- How could the biological carbon cycle have worked on the primitive Earth, where oxygen gas was essentially absent from the atmosphere and oceans?Why did the evolution of multicellular organisms such as plants and animals have to be preceded by the evolution of oxygen-producing photosynthesis?Which of the following pairs of taxa are most closely related? A. Eubacteria and Archaea B. Archaea and Eukarya C. Eubacteria and the Last Universal Common Ancestor D. Eukarya and Eubacteria E. Eukarya and the Last Universal Common Ancestor?
