01_03_earths_early_etmosphere

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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

Why are scientists interested in the primordial synthesis of organic molecules when it comes to the genesis of life?

Many scientists claim that the synthesis of the first organic molecules from inorganic precursors was possible because of the highly reducing atmosphere found on primitive Earth. Which of the following is an appropriate null hypothesis that could be used when investigating the claim? * The level of atmospheric oxygen on modern Earth is significantly higher than on primitive Earth.       Organic molecules were transported to primitive Earth by a meteorite or other celestial event.       The synthesis of organic molecules from inorganic molecules is possible under current atmospheric oxygen levels as well as those found on primitive Earth.       The absence of a significant quantity of atmospheric oxygen is required for the synthesis of organic molecules from inorganic precursors.

For a long time, it was believed that life originated from decaying matter. What is this theory known as? Name the scientist who experimentally disproved this theory.

Question: A. What were the organic monomers that were created in the first step of chemical evolution and what are there organic polymers? B. How are the current changes in the ecosystem impact the evolution of organisms in the environment?

Please someone help me with Bio homework, thank you

Which of the following is least reasonable regarding the Urey-Miller experiment? Group of answer choices   The experiment was an important breakthrough in the study of the origin of life.   The experiment conifirmed that several of the key molecules of life could have been synthesised naturally on the primitive Earth.   The amino acids and other molecules produced in the experiment, and possibly present in the early atmosphere, could have participated in 'prebiotic' chemical processes, ultimately creating life.   This experiment, and others which followed, suggests that simple biologically significant molecules can evolve naturally under sets of conditions that may have existed not only on early Earth, but potentially elsewhere in the solar system and beyond.   The experiment was the first demonstration of abiogenesis (life from non-life).

EBDOSYMBIOTIC THEORY is the evolution theory that includes a larger and one smaller cell. The larger cell act as a host and the smaller cell is called the endosymbiont that is engulfed by the host cell. The larger cell referred to eukaryotic cell and the smaller cell represent prokaryotic cell. While BIOCHEMISTRY, is the study of the chemistry of cells and organisms. Thus, it is concerned with the types of molecules found in biological systems, their structure, and their chemical properties. QUESTION: How ENDOSYMBIOSIS THEORY applies to this subject (BIOCHEMISTRY)?

ENDOSYMBIOTIC THEORY is the evolution theory that includes a larger and one smaller cell. The larger cell act as a host and the smaller cell is called the endosymbiont that is engulfed by the host cell. The larger cell referred to eukaryotic cell and the smaller cell represent prokaryotic cell. While BIOCHEMISTRY, is the study of the chemistry of cells and organisms. Thus, it is concerned with the types of molecules found in biological systems, their structure, and their chemical properties. QUESTIONS: Relate how this theory (ENDOSYMBIOTIC THEORY) can applies to this course subject (BIOCHEMISTRY)? Note: Answer properly, make a connection how theory can ber applied to the subject.

With regard to the origin of life, why are biologistsinterested in the prebiotic synthesis of organic molecules?

One of the simplest definitions of a life-form is anything with the capacity to reproduce and regulate itself. Before life began, the complex organic, or hydrocarbon-bearing, molecules that makeup RNA and DNA, the building blocks of life, must have formed. No one knows exactly how life is formed from these molecules, but many ideas have been put forward. As you enter this area, go toward the large video screen on the right and explore the “Life at the hydrothermal Vents” label deck. Some scientists theorize that life begins at deep-sea vents. Find three lines of evidence to support this claim.

In the 1950s, scientists Miller and Urey conducted a classic experiment in which water, methane, ammonia, and hydrogen were sealed in a flask containing a pair of electrodes. An electric spark was fired between the electrodes, and after a week's time, they found that amino acids were present in the flask. Which of the following best explains the significance of this experiment in explaining the origin of life on Earth? A. It showed that any raw materials could produce the compounds necessary for life to exist on early Earth. B. It showed that life must have started somewhere else since organic compounds only come from living thin C. It showed how biological molecules can be formed from the very simple molecules that were available on early Earth. D. It showed how lightning can cause organic matter to decompose into amino acids, which were the first molecules on early Earth.

Presumably in the first billion years of the Earth’s existence, there were many chemical reactions occurring and some of these reactions formed large quantities of organic molecules that accumulated in the early oceans, lakes, etc. This is often referred to as the “primordial ooze” or “prebiotic soup.” The conditions of the early Earth changed so new organic molecules weren’t being made, however many of the molecules in the primordial ooze reacted together forming more complex molecules and even, after millions of years, primitive cells formed. For energy, these primitive cells could metabolize some of the remaining organic molecules and “eat” other cells. At some point millions of years later, photosynthetic bacteria developed, but note that these bacteria did not give off O2. Then more millions of years later, the Cyanobacteria (the Blue-Green Bacteria) evolved and these organisms could photosynthesize and they gave off O2.  a) With the above scenario in mind, discuss the…

Presumably in the first billion years of the Earth’s existence, there were many chemical reactions occurring and some of these reactions formed large quantities of organic molecules that accumulated in the early oceans, lakes, etc. This is often referred to as the “primordial ooze” or “prebiotic soup.” The conditions of the early Earth changed so new organic molecules weren’t being made, however many of the molecules in the primordial ooze reacted together forming more complex molecules and even, after millions of years, primitive cells formed. For energy, these primitive cells could metabolize some of the remaining organic molecules and “eat” other cells. At some point millions of years later, photosynthetic bacteria developed, but note that these bacteria did not give off O2. Then more millions of years later, the Cyanobacteria (the Blue-Green Bacteria) evolved and these organisms could photosynthesize and they gave off O2. a) With the above scenario in mind, discuss the significance…

Presumably in the first billion years of the Earth’s existence, there were many chemical reactions occurring and some of these reactions formed large quantities of organic molecules that accumulated in the early oceans, lakes, etc. This is often referred to as the “primordial ooze” or “prebiotic soup.” The conditions of the early Earth changed so new organic molecules weren’t being made, however many of the molecules in the primordial ooze reacted together forming more complex molecules and even, after millions of years, primitive cells formed. For energy, these primitive cells could metabolize some of the remaining organic molecules and “eat” other cells. At some point millions of years later, photosynthetic bacteria developed, but note that these bacteria did not give off O2. Then more millions of years later, the Cyanobacteria (the Blue-Green Bacteria) evolved and these organisms could photosynthesize and they gave off O2.  a) With the above scenario in mind, discuss the…

What is the significant about the type of structure shown in the image? Select one alternative: O They are composed of silicon-based life forms. O They are the earliest known life forms on Earth. O They are considered a potential energy source for life elsewhere in the universe. O They are extreme environments where microorganisms cannot survive. O They are ancient microbial structures found on Mars.

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

Essay type : Answer the following questions. (please intend me atleast 3 to 4 paragraphs) Why do we need to study the origin of life on earth?

What evidence is there for the hypothesis that life originated on Earth by the creation and polymerization of small organic molecules by natural processes?

“There might be life on Europa because it has an atmosphere that contains oxygen just like the Earth” Is this a strong analogy argument, and can be made stronger?

“What is the origin of life or the main ancestor of all organisms?”, what would be your answer and why?

An astrobiologist discovers a new form of life on another planet. Life here appears to have evolved using DNA as the information storage molecule and proteins to carry out cellular function, much like on Earth, however the individual building blocks on this planet are different. On this planet, there appear to be 3 different nucleotides in the DNA and 30 different amino acids in the proteins.    Which of the following conclusions about this form of life would be most justified? These organisms can produce proteins no more than 30 amino acids in length. These organisms must produce 30 different forms of mRNA Amino acids must be coded by sets of 3 nucleotides in the DNA of the organisms on this planet. Amino acids must be coded by sets of at least 4 nucleotides in the DNA of the organisms on this planet. These organisms cannot produce more than 30 kinds of protein.

What led to the discovery of the three domains of life? Group of answer choices comparing cell wall biochemistry comparing enzymes in glycolysis comparing genetic sequences for ribosomes 5

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This is question true or false can someone help me

give a description of the theory proposed by oparin, miller, sagan, fox and others for the orgin of life from non-living material. What do you think about the origin of life?    -philosophy of science

Place the following events of the beginning of life in their correct order. - organic polymer form - inorganic molecules form -DNA based cells from - organic monomers form - photocells in the RNA world form

Name the study of possible life outside the earth.

Please answer these questions Properties of life: Organization Metabolism Homeostasis Growth Reproduction Response Evolution

Which molecule is believed to have preceded the other two during the evolution of life? RNA     Proteins     DNA