In the three-domain model, the bacterial ancestor of chloroplasts derives from ancient A) O fungi. B) O phototrophic cyanobacteria. C) O heterotrophic bacteria. D) O archaea. E) protists.

Q: Briefly discuss the ways in which cyanobacteria reproduce.

A: Step 1 Cyanobacteria are Gram-negative oxygenic photoautotrophs that have a procaryotic…

Q: . In what ways are bacteria and archaea essential to eukaryotic life?

A: Microorganisms are broadly grouped into Bacteria, viruses, algae, fungi, and protozoa.…

Q: What features unite some of the major lineages of eukaryotes?

A: New molecular evidence has allowed for the reclassification of protists into large “supergroups.”…

Q: Which of the following prokaryotic kingdoms is characterized by the absence of a nucleus, the…

A: Different kindoms in the classification consists of different organisms. They all have different…

Q: Why do we think that cyanobacteria rather than purple or green bacteria gave rise to chloroplasts in…

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

Q: What does the Endosymbiotic theory say?

A: Endosymbiotic theory or symbiogenesis is an evolutionary theory of the origin of eukaryotic cells…

Q: What's the endosymbiotic theory?

A: Life on earth appears around 4 billion years ago. The first eukaryotic cell that appeared on earth…

Q: What role did the increase of atmospheric oxygen by prokaryotes play in the development of the…

A: The studies on geological history of oxygen shows that before photosynthesis evolved, the earth's…

Q: Provide a substantial theory regarding how eukaryoticcells originated and how multicellularity came…

A: Prokaryotic cells are those that lack nucleus and other membrane bound organelles. Eukaryotic cells…

Q: What is the endosymbiotic hypothesis?

A: The endosymbiotic hypothesis was first presented as an idea in 1905 by the Russian botanist…

Q: In what ways are bacteria and archaea similar and different?

A: The prokaryotes were the earliest cells to be formed during the primitive time on Earth. The only…

Q: What is the spontaneous generation hypothesis?

A: Spontaneous generation Hypothesis: According to this theory life was originated from non living…

Q: Why would archaea that grow in extreme environments be more intensively studied than those that do…

A: Bacteria exhibit unique capabilities of surviving in extreme environments. They are present in the…

Q: To which two domains do theprokaryotes belong?

A: There are many different types of living organisms found on the planet. The arrangement of organisms…

Q: How does serial endosymbiosis explain the origin of chloroplasts?

A: Chloroplast is an organelle present in algal and plant cells. This organelle is responsible for…

Q: What is endosymbiotic theory ? explain the assumptions of the endosymbiotic theory ?

A: Prokaryotes are those organisms which lack a membrane bound nucleus. They consist of eubacteria and…

Q: Which traits are shared by all eukaryotic cells, and what are the three major lines of evidence that…

A: Traits shared by all eukaryotic cells:  Presence of well defined nucleus that contains the genetic…

Q: Who proposed Endosymbiotic theory?

A: The cells are the basic building blocks of the living system. It consists of many internal…

Q: Provide importance of endosymbiotic theory ?

A: The endosymbiotic theory describes the origin of eukaryotic cells from prokaryotic cells. In ancient…

Q: How many endosymbiotic events are required to account for the diversity of photosynthetic…

A: Endosymbiont is an organism that lives within another organism and sometimes maintains a mutualistic…

Q: When did prokaryotic cells first appearon Earth?

A: The age of Planet Earth is around 4.5 billion years. It was formed when a swirling mass of gas and…

Q: What types of environments are inhabited by archaea? Why are methanogens important?

A: Microorganisms are those that can only be seen with the help of microscope and can not be seen wit…

Q: Where did eukaryotes come from?

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

Q: What is one of the species of Doamin Archea? What was is it determined to be a member of the Domain…

A: Bacteria are a type of biological cell that constitute a large domain of prokaryotic microorganisms.…

Q: What is the endosymbiotic hypothesis for the originof mitochondria and chloroplasts? What…

A: A cell is the fundamental unit of life. All living organisms are made up of one or many cells. The…

Q: How can the small size and haploid genome of Bacteria andArchaea accelerate their evolution?

A: Microorganisms or microbes are microscopic organisms that exist as unicellular, multicellular, or…

Q: Are bacteria the only prokaryotic beings?

A: Bacteria are microscopic single-celled prokaryotes that thrive in diverse environmental conditions.…

Q: Can prokaryotes evolve rapidlyin response to environmental change?

A: Prokaryotes are the primitive organisms that is is they are less developed. They do not have…

Q: How did the appearance of Cyanobacteria change the atmosphere of the ancient earth ?

A: Cyanobacteria/Blue green algae are photosynthetic.   They convert sunlight into energy and…

Q: What evidence supports the idea that the mitochondrion andchloroplast were once free-living members…

A: According to the evolutionary theory of endosymbiosis, the eukaryotic cells arose from prokaryotic…

Q: What are some prooves of Endosymbiotic theory?

A: There are various perspectives from which eukaryote origins can be viewed, including…

Q: How would the nitrogen cycle operate in the absence of bacteria and archaeons?

A: Nitrogen is a constituent of organic compounds such as amino acids, nucleic acid, proteins,…

Q: How do eukaryotic cells differ from bacteria and archaeons, and how do these differences explain the…

A: In the living world, we see a large number of microorganisms, animals and plants. These organisms…

Q: What do the terms phycobiont and mycobiont signify?

A: Biological interaction between two organisms of the same or different species is more specifically…

Q: What effect did the events describe endosymbiotic theory have on eukaryotic energy production?

A: The endosymbiotic theory states that some of the organelles in eukaryotic cells were once…

Q: When do bacteria form endospores? a-when they get ready to reproduce b-when environmental conditions…

A: Endospores are seed-like formations produced within the bacteria.They are extremely durable and…

Q: How many species of Bacteria and Archaea have been named?How many likely exist?

A: Microorganisms are the microscopic organisms that cannot be seen through the naked eye.…

Q: Describe endosymbiotic theory?

A: According to the endosymbiotic theory, chloroplast and mitochondria are bacterial endosymbionts. It…

Q: What are the major characteristics that distinguish cyanobacteria from other photosynthetic…

A: Cyanobacteria, commonly known as Cyanophyta, is a phylum of Gram-negative bacteria that uses…

Q: • Suppose living organisms were to be found on Mars. How might such a fi nd shed light on the origin…

A: Endosymbiotic theory suggests that the Eukaryotic cell organelles such as mitochondria and…

Q: What evidence supports the hypothesis that mitochondria preceded plastids in the evolution of…

A: Introduction Evolution is the key process that regulates the survivability and continuity of species…

Q: When you see the evolutionary tree, what does it tell you about microbial evolution? How have we…

A: Key facts that we derive from evolutionary bree of micro-organisms can be as follows -…

Q: Endosymbiotic Theory?

A: Endosymbiotic theory states that some of the organelles in today's eukaryotic cells were once…

Q: What type of evolution do bacteria have? Is it Divergent, Convergent, or Parallel?

A: Evolution occur to natural selection or by mutation. The role of natural selection is to pass on the…

Q: How do prokaryotes reproduce? What mechanisms result in gene transfer?

A: Introduction:- Prokaryotes are creatures without a nucleus or other organelles in their cells.…

Q: What is Endosymbiosis?

A: Endosymbiosis is a form of interaction where one organism can survive inside another organism by…

Q: What is a prophage in biology?

A: The viruses that infect bacteria are termed as bacteriophage. Bacteriophage uses two different…

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.