7. Which of the following statements about early life on earth is incorrect? A) Earth was anoxic B) Carbon was obtained from CO2 C) Energy was obtained from glucose D) D) Cells were likely chemolitbotrophic

Q: The Cenozoic Era extended over which of the following time periods in the fossil record? A. the…

A: Answer : The Cenozoic Era extended over  time periods in the fossil record is :  a)  the Paleozoic…

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: In what way was the evolution of eukaryotic cells linked to the increase in the oxygen concentration…

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

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 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 is the correct order of appearance in the fossil record, starting with the earliest: eukaryotic…

A: They consist of eubacteria and archaebacteria. Bacteria are simple prokaryotic organisms which are…

Q: what is a mold? A. the imprints from an organism can be a shell or the skin of an animal B. Molds…

A: Fossils are the preserved remains of the organisms that die. The palentologists deal with two basic…

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: What types of organisms flourished in the Cambrian?

A: Evolution is the process of slow and gradual change over a period of time. There are different…

Q: 9. Which of the following groups of organisms are considered likely to have been the first living…

A: Question - Which of the following groups of organisms are considered likely to have been the first…

Q: Regarding early life on Earth, A) microbial life existed for billions of years before plant and…

A: The early earth atmosphere was probably mostly carbon dioxide with little or no oxygen. There were…

Q: What caused the very first organisms to develop a mechanism for reproduction?

A: Reproduction transmits genetic material from generation to generation. This genetic information…

Q: What do you know about the ecology of the first cells that might suggest that we should look for…

A: Earth is so far the only planet that has the capability to sustain life on it. There are many…

Q: List six pieces of evidence that support the endosymbiotic hypothesis

A: Different forms of free-living prokaryotes were integrated within larger prokaryotic cells and…

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 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: 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: ich of the following questions about the origin of life on Earth is most scientifically testable? *…

A: Different theories have been put forward to explain the origin of life on earth. Some of those…

Q: How would the appearance of protocells have represented a key step in the origin of life?

A: Introduction  Origin of life on earth can be traced back to 3.4 billion years ago and as we now know…

Q: How did scientist think the first life may have evolved on earth?

A: Evolution is the change in the characteristics of a species over several generations and it relies…

Q: Scientists propose that the first macromolecules in protobiontswerea. DNA molecules.b. RNA…

A: Macromolecules are large molecules composed of thousands of covalently connected atoms. Proteins,…

Q: Scientist have determined that the early Earth had no free oxygen anywhere. Briefly explain what…

A: Scientists suggest that the early atmosphere of the earth was very hot and had no ozone or free…

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

A: Primitive atmosphere was reducing rich in Hydrogen (H2) and free molecular oxygen (O2) was absent,…

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: 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: 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: 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: What was the most significant contribution of early photosynthetic organisms to Earth’s environment?

A: Photosynthesis is preparation of food by the use of light and carbon-dioxide gas.

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: How did the presence of molecular oxygen in the atmosphere affect early life?

A: Life originated nearly 3.6 billion years ago in the deep ocean.  The first organisms to be evolved…

Q: Radioisotopes are useful in dating fossils and rocks because

A: Fossils  They are remains of animals which are preserved in ice or in deep underground or inside…

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: 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: 5. The Cenozoic Era extended over which of the following time periods in the fossil record? A. the…

A: Geological time scale is a representation which evaluates how the life originates and undergo…

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: Here is the question: What was the likely source of the raw material incorporated into the first…

A:

Q: Describe the “chemical fingerprint of the archaean fossil first discovered in the Messel oil shale…

A: Introduction: Archaea are single-celled microorganisms with structures like bacteria. They are…

Q: What was the “Cambrian explosion” and how might you explain it?

A: Introduction  Cambrian explosion event was occurred nearly 541 million years ago during the Cambrian…

Q: Where does the material to construct these massive organisms come from?

A: An organism consist of an organized structure that reacts to stimulus, adapts, growth, reproduces,…

Q: Describe the specimen and explain how the presence of fossil bacteria supports the idea that the…

A: Answer : specimen is the term used for the sample of anything which is used for testing and which…

Q: How did endosymbiosis contribute to the evolution of eukaryotes?

A: Symbiosis is defined as a close relationship between two different organisms. The endosymbiosis…

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: Why was the origin of cyanobacteria of suchimportance to the evolution of life on Earth?

A: Cyanobacteria, also known as Cyanophyta are a phylum of prokaryotes consisting of both free-living…

Q: Which sequence of events accurately describes the history of the planet (from oldest to youngest)?

A: The history of our planet, Earth, started with the formation of the solar system. The solar system…

Prokaryotic evolution

The term evolution means the gradual change or a transformation from a simple or primitive state to a complex or advanced state. Prokaryotic evolution is a concept that involves the evolution of the form and function of most primitive organisms (prokaryotes) through several stages and changes to form diverse life as a part of organic evolution.