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

Q: When considering the entire period of time during which life on Earth has been evolving, we must…

A: To understand the change in flora and fauna that have occurred over million of years on Earth ,we…

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: The period of the history of the earth that is referred to as Chemical Evolution was essential for…

A: Chemical evolution explains how life started on Earth. Chemical evolution refers to changes in…

Q: How did discoveries in the deep sea influence scientists' ideas about whether life could be found…

A: A discussion of life elsewhere therefore naturally begins with a review of some key aspects of the…

Q: Which of the following would be the most likely place that life would first form on Earth?

A: Which of the following would be the most likely place that life would first form on Earth?  Answer.…

Q: Place these events in the history of life on Earth in the order that they occurred. a. accumulation…

A: Evolution is the process of slow gradual change over a period of time.  The process of evolution…

Q: What are the eons in which the following events occur? Origin of Earth. Oxygen appeared in the…

A: Eon is geologic time and it is such a long time that cannot measure. Firstly, the origin of the…

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: 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: 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: Describe how scientists have tested the hypothesis that simpleorganic molecules could have formed on…

A: There are fossils that were discovered from Western Australia 3.5 million years ago (mya). This…

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: The first single-celled organisms on Earth probably evolved (a) 3,700 years ago (b) 3.7 million years…

A: Evolution is a process of slow and gradual change over a period of time. There are many pieces 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: 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: 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: During the Early _______________, life consisted of prokaryotic cells, but by the end of this…

A: The major evolution evens since the origin of the earth have been categorized into three major eras.

Q: What was the Earth like million of years ago?

A: Millions of years ago, there is no life on the Earth. The temperature of the Earth was scorching,…

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: Geological time covers huge spans, up to billions of years. Yet humans rarely live for more than 100…

A: Geological time scale is important to understand the history of earth that how several natural…

Q: Why are scientists interested in the primordial synthesis of organic molecules when it comes to the…

A: Introduction: The Oparin-Haldane hypothesis proposed that inorganic molecules in the atmosphere of…

Q: Humans have been around for only about years of the planet's 3.8 billion years in existence. 90,000…

A: Approximately 6 million years ago, a primate group known as Ardipithecus formed the first vital…

Q: What does Oparin – haldane hypothesis about origin of life suggests.

A: The Oparin-Haldane theory of the origin was discovered by two scientists Aleksandr I. Oparin and J.…

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: Why is there a need to classify the great diversity of life?

A: Need to classify the great diversity of life.

Q: What theory of fhe origin of life do you think is most possible?why?

A: Life on Earth started over 3 billion years ago, developing over time from the most fundamental of…

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 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: Scientists Stanley Miller and Harold Urey set up an experiment modeling the environmental conditions…

A: Conclusion from stanley Miller and Harold urey experiment is:- Life assembled from chemical building…

Q: Match the forms of life below with the earliest (approximate) time that it existed. Note: the earth…

A:

Q: does the process of evolution drives the diversity

A: The branch of biology which deals with the study of heredity and evolutions known as the genetics.…

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: Which of the following theories as regards the origin of life on earth is accepted today? A. Theory…

A: The origin of life on earth is known to arise from the non-living matter, organic compound. The…

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: 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: D Question 4 Which mass extinction led to the disappearance of the dinosaurs? O Triassic O…

A: The recurrent rise and disintegration of ice sheets and glaciers driven by the Milankovitch cycles,…

Q: List in order of appearance the four stages of the origin of life and explain what was necessary to…

A: Evolution is the gradual changes occur in in living organisms over a long duration it is a very slow…

Q: The earth is about 4.6 billion years old. Based on the formation of seafloor spreading, why do you…

A: The newest, thinnest crust on Earth is located near the center of mid-ocean ridge—the actual site of…

Q: The field of geology helped to set the stage for the Theory of Evolution through an understanding…

A: Evolution is the science of how life evolves over ages, and evolutionary biology is the science of…

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: A. What do scientists think the primitive Earth was like? Give 3 evidences.   B. How could life…

A: Our current atmosphere of twenty one percent oxygen would make the emergence of DNA & other…

Q: Approximately when did life first appear on land A. 500 million years ago B. 2 billion years ago…

A: Question - Approximately when did life first appear on land A. 500 million years ago B. 2 billion…

Q: What is first domain organism in earth?

A: In this question, we have to answer the first domain organism of earth.

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: 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%…

Q: What type of plates that float on top of the mantle do scientist believe that the Earth's crust is…

A: The earth is made up of different layers: 1)The Inner core- It is the inner and hottest layer of the…

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: