Why do scientists think that all forms of life on earthhave a common origin?

Q: 4. Fill in the table: Step of how life started 1- evolution of monomers 2- evolution of polymers…

A: The flow of genetic information in a biological system is explained by central dogma and it involves…

Q: RNA is often characterized as being the first“biologically active” molecule. What two properties or…

A: The RNA world is a hypothetical stage in the evolutionary history of life on earth, in which self…

Q: How can you know what happened millions of years ago if no one was there to see it  Explain

A: Every living creature on the planet has the potential to evolve into something. Cells adapt to…

Q: What is the evolutionary history of life on Earth, and what are the major events and adaptations…

A: The history of life on Earth is a vast and complex subject that spans billions of years. Scientists…

Q: One of the prerequisites for chemical evolution on early Earth is that there was an adequate amount…

A: Early earth is not rich with oxygen until photosynthetic bacteria arrived after that oxygen levels…

Q: Once life began, what types of organisms lived on Earth forthe next two billion years? Where did…

A: Introduction There are several hypotheses presents on that how life starts on the primitive earth.…

Q: What evidence would you look for on one of these moons that would tell you that life may have…

A: The proof that we would look at Moon is about the indication for aspects of life.For example-…

Q: Which of the following conclusions about this form of life would be most justified?

A: Any life form that exists must have some form of central dogma for functioning and survivability,…

Q: What does it tell us if we discover life on one of these moons and it has characteristics similar to…

A: If we discover life on one of these moons and it shows alike characteristics as that of earth then…

Q: Why do radioactive isotopes in rocks nearly all have half lives of many millions to billions of…

A: Radioactive substances are substances that have unstable nuclei as a result they become stable by…

Q: what can you say about the story of earth?

A: Evolution mainly  focus on living organism. Evolution means "descent with modification" ( Darwin,…

Q: What is the origin and function of terra preta?

A: Terra Preta (Portuguese for "Black Earth") is a soil-building technology invented by ancient…

Q: Why can Earth, in many ways, be considered amicrobial planet?

A: Micro-organism are tiny organisms that cannot be seen by the naked eye, but are visible under…

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: describe 3 characteristics that make e

A: The third planet from the sun is the earth. And 29.2% surface of the earth is land and the remaining…

Q: Without an oxygen-free atmosphere, the organic compounds that started the story of life never would…

A: The Earth has been significantly altered by life. Organisms have influenced the composition of the…

Q: Life is found almost everywhere on Earth, but can you explain why it is not distributed evenly

A: The planet Earth on which life exists is quite unique because it is the only planet having the…

Q: Why, in the evolution of eukaryotes, might ithave been advantageous for separate organismsto become…

A: Living organisms are divided into three clusters called domains. They are formed of closely linked…

Q: During what geologic period did life on Earth begin?

A: Evolution is the process of gradual changes occurring in the species over a period of time, when the…

Q: What does the tree of life consist of?

A: The tree of life was proposed to understand the diversity of life. The tree of life is used to…

Q: How does the fact that Earth is a sphere tilted on its axis influence thedistribution of life?

A: Earth is so far the only planet that has the capability to sustain life on it. There are many…

Q: How is origin of life attributed to LIGHT and WATER? Give a detailed explanation.

A: The origin of life is still a mystery and not proved. There are many theories that are suggested by…

Q: Four billion years ago, the Earth was a thin-crusted inferno. Which probable stage of physical and…

A: Solar system was originated around 4.6 billion years ago from contraction of rotating gas and dust…

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: In what order did events occur that led to life on Earth? (1) appearance of aerobic organisms, (2)…

A: C is possible right answer

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: Has the number of species on Earth increased steadily since the origin of life?

A: Ans: Species: The species are those which are capable of interbreeding and producing the offspring.…

Q: What were conditions like on Earth when life first began? Be thorough here. What was the prebiotic…

A: Life is a characteristic of organisms that distinguishes them from non-living things. It is…

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: Lichens are formed by an association between: fungi and plants O algae and plants O protists and…

A: Introduction Ecology:- It is the study of the relationship between living organisms and their…

Q: What is the most accepted hypothesis on the origin of life on earth? How does it compare to the…

A: Introduction The heterotrophic hypothesis on the origin of life is the most compelling and widely…

Q: - How much time does it take for 1 half-life to occur?   -Approximately how many half-lives are…

A: Carbon is the element that is most commonly found in organic molecules. All organisms have a carbon…

Q: Why is the advent of cyanobacteria considered a critical step in evolution?

A: Cyanobacteria, conjointly called division, are a phylum of prokaryotes consisting of each…

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: Miller and Urey

A: In 1952, a University of Chicago chemist named Stanley miller and Harold Urey conducted a famous…

Q: Which of the following is the last step in the Oparin-Haldane Model for the beginning of life?   a.…

A: oparin and haldae suggested the  origin of life on earth , via the abiotic evolution .

Q: diversity complexity and relationship among organisms

A: The new techniques and methods have created exciting new channels of investigation of the methods…

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: Imagine an ancient sunlit estuary rich in clay deposits. Countless aggregations of organic molecules…

A: Several hypotheses have been made in relation to life's origins on Earth. In 1936, Alexander Oparin…

Q: 1) Select the concept below that best demonstrates compartmentalization of function in living…

A: Compartmentalization in living beings refers to the presence of discrete organelles in the cells…

Q: What do we mean when we write “all life in Earth is fundamentally the same”? A shark and a seaweed…

A: Living organisms are well arranged, which means that they are specialized. All living organisms…

Q: south america and africa are drifting apart. where might they be couple hundred years ago?

A: introduction: Continental drift theorey proposed by Alfred Wagener. According to wagener all tge…

Human Evolution

Human evolution is the process of evolution of humans from early man to anatomically modern humans. The process of evolution in humans leads to the gradual development of traits like bipedalism. Humans are the highly social animals that make them the most advanced animal on Earth.  Human evolution is an outcome of interaction among the following processes: