What was the composition of the earth’s atmosphere at the time of the origin of life, and how did it differ from the atmosphere of today?

Q: What is the difference in oceanic and continental crust?

A: Oceanic crust- Located beneath the ocean Thinnest,6-35km Youngest crust It is densest as a…

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: In which probable stage of physical and chemical evolution of life were gaseous oxygen and water…

A: Earth was formed some 4.6 billion years ago from the sun due to the continuous bombardment of huge…

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: 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: The heaviest elements during the Earth’s formation were what?  What part of the Earth did they form?…

A: The structure of the earth is divided into four major components: the crust, the mantle, the outer…

Q: What is the primary energy source for life on earth?

A: For species and the ecosystems in which they live, the Sun is the primary source of energy. Plants…

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: 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: What is the inner most part of the earth?

A: Earth can be divided into three main layers; Core Mantle Crust(divided into inner and outer core)

Q: What was the Great American Interchange? When did it occur, and what were the results?

A: Introduction: GREAT AMERICAN INTERCHANGE also known as Great American Biotic Interchange (GABI)…

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: Which of the mass extinctions was the largest? What percentage of life went extinct during that…

A: Mass extinction is defined as the dis-appearance of a large scale of biodiversity (animals +plants…

Q: How did the origin of photosynthesis affect subsequentevolution of life on Earth?

A: Evolution is a series of events through which new biological species develop over time from…

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 Oparin-Haldane Hypothesis assume about Earth’s primordial atmosphere? Why would this have…

A: Oparin-Haldane Hypothesis -Oparin-Haldane Hypothesis showed that how complex biological molecules…

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: What factors influenced the isotopic composition of oxygen in skeletons of marine organisms during…

A: The factors that influenced the isotopic composition of oxygen in the skeleton of marine organisms…

Q: What geologic resource exist in the ocean?

A: Marine geology is responsible for focusing on areas that are affected by the oceans which will…

Q: How could the biological carbon cycle have worked on the primitive Earth, where oxygen gas was…

A: Introduction : The balance of the nutrients in the biosphere makes life sustainable. The movement of…

Q: How can life possibly evolve in such an inhospitable environment?

A: Evolution can be defined as the unrolling of nature that brings about an orderly change from one…

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 carbon compound is the least available for the majority of life forms and why is this the case?

A: Carbon is present in the environment in many forms yet most living forms are not easily accessible…

Q: How were biomolecules likely to have formed on the early Earth?

A: The fundamental biochemical similarities that were observed in living organisms have developed…

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 does atmosphere enables life on Earth?

A: The atmosphere is the blanket of the air covering the earth`s surface. Air is a mixture of gases.…

Q: what is the difference between evolution and acclimation and how do they work with climate change?

A: Acclimation and evolution are the beneficial changes takes places in the organism . It allows…

Q: Why are deep ocean waters typically low in oxygen?

A: The biogeochemical cycle that leads to the interconversion of environmental carbon in different…

Q: HOW OLD IS EARTH?   HOW LONG DID THE LONGEST EON (SO FAR) LAST?

A: Different planets have different atmosphere.

Q: Which scientists investigated the origins of organic molecules on the primordial Earth?

A: Evolution is a continuous process and we are still evolving. Evolution is nothing but adapting to…

Q: What's the earth crust?

A: Earth is a planet that is made up of the lithosphere, hydrosphere, and atmosphere. All of these…

Q: What is the relationship between solar radiation and ocean circulation

A: Solar radiation is the electromagnetic radiation emitted by the sun. This radiation is formed due to…

Q: We are relatively "new" to the Earth yet how come our impact to the Earth System has been profound?

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: Could the First Biological Molecules Have Formed NearVolcanoes on Early Earth?

A: In 1953, Stanley Miller conducted an experiment in the laboratory of Harold Urey to understand the…

Q: How are igneous rocks formed?

A: There are three kinds of rock: igneous, sedimentary, and metamorphic.

Q: How does the hydrosphere interact with the atmosphere?

A: The earth can be divided into four subsystems, called spheres. There are four spheres - lithosphere…

Q: A. How old is the Earth? B. How long did the longest eon (so far) last? C. How many years ago did…

A: Epoch is longer than era. Eon is the longest period of geological time.

Q: WHAT IS MASS EXTINCTION? HOW DID MASS EXTINCTION EVENTS INFLUENCE EARTH'S HISTORY?

A: Extinction is the termination of a kind of organism or of a group of kinds, usually a species.

Q: When scientists try to assess the habitability of Mars, what is their guiding principle, based on…

A: Introduction Life:- It is defined as any system capable of performing functions such as breathing,…

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 are the different periods in the history of the earths broken up?

A: Evolutionary biology is the branch of biology that deals with the study of evolution or orderly…

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: How is earths atmosphere heated ?

A: Atmosphere is a layer or a set of layers of gases surrounding the earth.It is held near the surface…

Abiogenesis