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: When did photosynthetic organisms first appeared? O From the very beginning of life, they are some…

A: Photosynthetic creatures, also called photoautotrophs, are photosynthesis-capable organisms. Higher…

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: 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: 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: What is a fossil? * O A rock that has turned into biological material over time Remains of an…

A: Fossil records are important to study the process of evolution. Fossils are the treasures that…

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: When a chemical is heated in a flame, the flame has a unique color. This knowledge was eventually…

A: The metal or elements when heated in a flame, the electrons present in the metal or element will…

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: All living organisms use DNA and RNA as their genetic code. Humans and roundworms, in fact, have 25%…

A: Evolution is defined as the change in trait of an individual in a species over a period of time.

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: M 1 2 3 4 10,000 bp 3,000 bp 1,000 bp 250 bp

A: On the lane 4 , When the DNA appears as a messy , continuous band at the bottom rather than a…

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: What is the charge of an electron? no charge O positive neutral negative

A: Electron are subatomic particle carries negative charge and proton carries positive charge while…

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: 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: 2. Radiometric dating does not measure the age of an individual atom. It is a measure of the age of…

A: Radiometric dating is a technique used to date the carbons, fossils and rocks to analyze its age and…

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: A rock sample which originally contained 400 grams of radioactive isotope X now contains 25 grams of…

A: The half-life of a sample is the amount of time it takes for half of the original radioactive…

Q: A. What is the PROTEROZOIC LIFE? B. Discuss the Great Oxygenation Event. C. Discuss the CAMBRIAN…

A: Geological time scale is a evolutionary event  which determines how the life appear , its…

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: (e) If you collected a sample of water being ejected from Saturn's moon, Enceladus, you could…

A: A sample-return mission is a spacecraft mission that collects and returns samples to Earth for study…

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: