What did the Miller-Urey experiment demonstrate? A. Life originated in outer space and was brought to Earth on a meteor. B. Complex molecules can be formed from water, carbon dioxide, methane, ammonia, and hydrogen gas in a reducing atmosphere. C. Eukaryotic cells evolved from prokaryotic cells following an endosymbiotic event. D. RNA was the genetic storage merial before DNA.

Q: The hypercycle model explains which of the following?     A) How the evolutionary transition from…

A: A hypercycle can be understood as an unique demonstrate of organization of self-replicating…

Q: Which statement about spontaneous generation is false?   A. It addresses the formation of living…

A: Spontaneous generation is the idea that emphasizes the point that living organisms originate from…

Q: What are the weaknesses of the origin of life theories?

A: At the turn of this century, spontaneous generation began to make a comeback as a scientific theory…

Q: Outline the major steps hypothesized to have occurred in the origin of cells.

A: Cells are the basic structural and functional unit of the living organisms. Cells group together to…

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

A: Raw materials  Raw material are the basic materials from which the things are made. Like raw…

Q: What event is thought to have contributed to the evolution of eukaryotes? a. global warming b.…

A: Eukaryotes can be defined as organisms that comprise of eukaryotic which includes the protists,…

Q: Hypothesize and diagnose the structure of DNA

A: Nucleic acid are biological macromolecules which consists of :- A ) DNA  B ) RNA  DNA is…

Q: Describe the hypothesized steps in the origin of eukaryotic cells.

A: Eukaryotes are multicellular organisms whose cells have membrane bound organelles, well-defined…

Q: During the course of evolution why DNA was choosen over RNA as genetic materials?

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

Q: While how the first cells formed is still unknown, scientists suspect that the first active…

A: Biological macromolecules are those molecules that are monomers ( Nucleic acids, lipids,…

Q: What was Stanley Miller's experiment (1953) on the origin of life?

A: Introduction In this question we will about the Stanley Miller's experiment (1953) on the origin of…

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: Compare and contrast the evolutionary theory and creationism theory on the origin of life molecules,…

A: INTRODUCTION Creatoinism The creationism theory state that the whole universe, Earth and life in it…

Q: In 40 words or fewer, explain why we think that RNA, and not DNA, was the hereditary material in the…

A: DNA or deoxyribonucleotide is the genetic material that is found in most of the organisms including…

Q: With regard to the origin of life, why are biologistsinterested in the prebiotic synthesis of…

A: Introduction The Oparin-Haldane model suggested that under the highly reducing atmosphere 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: Why were cyanobacteria so important in the evolution of life onEarth?

A: Cyanobacteria is a known phylum that is known to contain the photosynthetic bacteria along with the…

Q: Explain the RNA world hypothesis.

A: The initial conditions of the planet earth was way too hostile to support any sort of life. Once it…

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: The most pivotal event in the history of life on Earth, allowing for the emergence of eukaryotic…

A: A Eukaryotic cell is a Membrance bound organelle like Endoplasmic Reticulum, Mitochondria and…

Q: What ate the components of the DNA and RNA molecule?

A: Hormones are your body's substance couriers. They make a trip in your bloodstream to tissues or…

Q: What is the origin of life or the main ancestor of all organisms?”, what would be your answer and…

A: Answer: As the question depicts that it is the topic of EVOLUTION.  EVOLUTION: this is the process…

Q: How does the structure of a DNA molecule help account for the great variety of life that exists on…

A: DNA is the specific and dominant building block of the entire living organisms. They provide almost…

Q: Comment on RNA’s role in catalysis and coding in theories of the origin of life.

A: RNA is considered an important molecule from evolutionary times.

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: Which occurrence represents an example of evolution? a. Exposure to radiation reduces the rate of…

A: Evolution is the change in the characteristics of a species over several generations. It relies on…

Q: Why was the development of enzymes fundamental to the evolution of life?

A: Answers:  ENZYMES = These are the chemical molecules produced by many microorganisms, When they…

Q: the landmark experiment by Miller and Urey, and various repeats of this experiment, did not…

A: Introduction: The mentioned experiment was carried out to understand the various ways in which the…

Q: What was the reason dolly the sheeps birth important for science?

A: Cloning is a technique of formation of organisms that is clone / exactly similar to their parent .…

Q: Which molecule -DNA or RNA- do scientist believe was found in the first life form on Earth? Why do…

A: DNA is the double helix structure. RNA is the signal helix structure.

Q: The first forms of life on Earth were thought to be_________. a. single-celled plants b. prokaryotes…

A: A) single celled plants

Q: Which of these provides evidence of the common ancestry of all life? A) the ubiquitous use of…

A: One of the strongest evidences for common descent and ancestry comes from gene sequences.

Q: The Miller experiment did not create life, nor did the gases used resemble Earth’s first atmosphere…

A: In 1952 Miller and urey conducted experiments to hypothesize the formation of complex organic…

Q: Provide a brief discussion in support of the following statement: “RNA is believed to have played an…

A: DNA encodes RNA, which regulates protein synthesis. Proteins are responsible for the biochemical…

Q: How did the Miller-Urey experiment impact the way scientist think about the origins of life

A: The slow and gradual change over a period of time is called evolution. There are many theories of…

Q: What evidence is there for the hypothesis that life originated on Earth by the creation and…

A: The origin of life on the earth is both an interesting and a difficult question to answer. We have a…

Q: For a long time, it was believed that life originated from decaying matter. What is this theory…

A: For a long time, it was believed that life originated from decaying matter. This theory is known as…

Q: Oparin-Haldane hypothesis

A: Answer:

Q: Which of the following was likely MOST important for life to begin existing on Earth?   A. sunlight…

A: The correct answer is-  C. Sunlight

Q: Single-celled Eukaryotes were preceded by what environmental development on Earth? O a. The forming…

A: Eukaryotes are the organisms having well defined nucleus with cellular organelles such as…

Q: Life first appeared on Earth ___________ of years ago. Choose one: A. billions B. hundreds…

A: Earth is formed around ~4.5 billion of years ago. Life on earth had started after some time.

Q: How does the autotroph hypothesis explain the origin of life?

A: Autotrophic hypothesis :- This theory states that first living organisms on earth were autotrophs…

Q: If living cells were produced in a test tube from nonbiological components by chemical processes,…

A: The first cells that appeared on the earth are believed to be prokaryotic heterotrophic and are…

Q: The Miller experiment consisted of various gases, believed to have been present in the early…

A: Millers experiment proved that If electric discharge is passed through a mixture of such gases have…

Q: Discuss how multicellular organisms and viruses have benefited from prokaryotic cells?

A: All the organisms are made up of cells. The cells are the basic living unit of the organisms. The…

Q: The Miller-Urey experiment was a landmark step in our understanding of the origins of life. But what…

A: Introduction Stanley Miller and Harold Urey devised a test to put Oparin and Haldane's theories to…