Which of the following is not thought to have been a source of organic molecules on early Earth?* O Meteorites Radiation from the sun O Cosmic dust Hot water near volcanoes

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: HISTORY OF LIFE ON EARTH can safely opper layer hquake), ists then d in the cientist t level ter ago…

A: Let's break down each question step by step: 1.1) The solid formed from the hardening of the liquid…

Q: In Miller’s original experiments on chemical evolution, which of the following molecules (gases) is…

A: When Earth formed 4.6 billion years ago from a hot mix of gases and minerals, it had almost no…

Q: The pr O Allo O Dep radi O Alla dete O Pred

A: Knowing the biological age of the fossils aids in analyzing the developmental process that has taken…

Q: What experimentation has been done on finding the source or raw material for the first life on…

A: Harold Urey and Stanley Miller are two American scientists who attempted to create similar…

Q: Which of the following is not a reason why RNA is expected as one of the first primary molecules in…

A:

Q: Understand the importance of the Miller-Urey experiments that recreated the conditions present in…

A: Stanley Miller and Harold Urey demonstrated in their experiment that UV radiations or electric…

Q: If we could capture the spectrum of an exoplanet, we may find evidence for life on that planet in…

A: Fossils are the evidences for the history of the life on earth, the remains of a organism or any…

Q: Which of the following geologic periods is not part of the Paleozoic Era? the Carboniferous Period…

A: The objective of the question is to identify which of the given geologic periods does not belong to…

Q: What argument convinced most scientists in the 1800s that Earth was more than 6,000 years old?…

A: Fossils are the remains of the organisms that were present on the earth in the past.

Q: Which of the following eras in Earth's history is the longest? Precambrian Cenozoic Paleozoic…

A: A geological era divides eon into smaller unit of time. Geological era are further divided into…

Q: -If 30 percent of the carbon-14 atoms remain in a sample, how long ago did the organism die? -Is…

A: The unstable isotope of the carbon is Carbon 14 (C-14). The half-life of a C-14 is 5730 years old.…

Q: According to this image of the carbon cycle, from your OpenStax textbook, which of the following…

A: Option 1 is the answer. Photosynthesis removes carbon from atmosphere in the form of  carbondioxide.

Q: 69. Theoretically, radiocarbon dating (Carbon-14) can date materials that are at most   1.31…

A: Radiocarbon dating (also known as carbon dating or carbon-14 dating) is a method of determining the…

Q: Assume a flat Friedmann-Robertson-Walker universe. Calculate the redshift z at which the temperature…

A:

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

A: on the early earth, there had much time to generate a suitable condition which may lead to the…

Q: A fossil is found to contain the radioactive parent and daughter isotopes uranium 235U, and lead…

A: INTRODUCTION The determination of the relative age of a rock is predicated on the principle of…

Q: You are digging for fossils and found an ancient one with well preserved cellular contents. After…

A: The objective of the question is to identify the group of organisms to which a fossil belongs based…

Q: and why? W

A: INTRODUCTION  Before long and many years, progressed space-and ground-based observatories will…

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: Radiometric dating uses the decay of              to             to determine how old fossils of…

A: Radiometric dating determines the age of historical objects in years via measuring the occurrence of…

Q: The origin of life happened under planetary conditions C very similar than those at the present…

A: There has been much discussion over the beginning of life on Earth. The evolution of life has been…

Q: Miller and Urey

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

Q: If 1 meter equals 1 billion years and each millimeter is 1 million years, is 4.6 meters 4,600…

A: Given that we have to represent time on a linear scale with 1 metre equal to 1 billion years.…

Q: Given the life-style we live today, what pre-historic period gives us the ability to heat our homes,…

A: the ability to heat our homes, run our cars, and have a comfortable life was the ability of humans…

Q: A. What were the organic monomers that were created in the first step of chemical evolution and what…

A: Evolution is the gradual alteration of a species' traits over many generations. The basic idea of…

Q: Which of the following would be required for the first life forms to have originated on Earth? Mark…

A: The entire process of biochemical origin of life can e categorized into two subsequent events :…

Q: Large amounts of oxygen gas first appeared in Earth's atmosphere about ______ years ago. 10…

A: The theory behind the appearance of large amounts of oxygen gas in Earth's atmosphere about 2.7…

Q: In the prebiotic world, the chemical evolution scenario proposes that:     Small inorganic…

A: Life originated on the earth 4.2 billion years ago. Prokaryotes were the first formed organism on…

Q: The term Anthropocene implies that

A: Epoch, in general, termed as a very important period of time in history

Q: True or false: The "Miller Urey" experiment that found heating and cooling gases such as H20 and CH4…

A: This research suggests that at least a few of the components of life may have developed abiotically…

Q: Beyond the usual carbon based life, and proposed life based on silicon, what other compound is…

A: Carbon based Life   The life on earth is carbon based this is because carbon have unusual tendancy…

Q: Fact or theory? Organisms that look similar have been observed to have differences when preserved in…

A:

Q: Fill in the blanks. The parentheses after the blank represent the choices for each blank.…

A: Gondwana was the ancient supercontinent which existed millions of years ago. At that time, primitive…

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: