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Answer : The correct answer is -

A) Eubacteria.

Eubacteria is one of the three domains of life forms ( other two being Archaebacteria and Eukarya) that includes unicellular, prokaryotic organisms.

It means that the organisms are composed of single cell and are devoid of nucleus and membrane bound subcellular compartments ( cell organelles).

Example- E. coli bacteria.

Thus, option A) is the right answer.

Eubacteria is the kingdom that is composed of unicellular organisms that are prokaryotic.

Further Explanation

Classification

  • Classification is a science of classifying organisms based on their similarities and differences.
  • Organisms are classified into six major kingdoms, namely; kingdom Plantae, kingdom Eubacteria, Kingdom Animalia, Kingdom Fungi, kingdom Protista, and kingdom archaebacterial.

Kingdom Eubacteria

  • Kingdom Eubacteria is a kingdom that is composed of true bacteria.  
  • The members of this kingdom have the following characteristics;
  1. They are prokaryotes  
  2. They possess cell walls that are made up of peptidoglycan  
  3. Organisms are unicellular and complex
  4. Organisms in this kingdom are found everywhere  
  5. These organisms have flagella  
  6. They have ribosomes for protein synthesis  
  7. They lack membrane bound organelles such as lysosomes, Golgi apparatus, mitochondria, etc.

Eukaryotes  

  • These are organisms that contain membrane bound nucleus and membrane bound organelles such as endoplasmic reticulum, Golgi apparatus, mitochondria, etc.

Prokaryotes  

  • These are organisms that lack nucleus membrane and a nucleus together with membrane bound organelles. They include lower organisms such as bacteria and Archaea.
  • Archaea and bacteria are examples of prokaryotes since they lack nucleus and other membrane bound organelles such as mitochondrion, endoplasmic reticulum, etc.

Keywords: Prokaryotes, Eubacteria, Archaea,  Bacteria

Learn more about  

  • Kingdom Eubacteria: https://brainly.com/question/3997819
  • Similarities between Archaea and Eubacteria: https://brainly.com/question/3997819
  • Differences between Archaea and Eubacteria; https://brainly.com/question/3997819
  • Archaea: brainly.com/question/1067634
  • Bacteria: brainly.com/question/2901356
  • Prokaryotes: brainly.com/question/577088
  • Eukaryotes: brainly.com/question/577088

Level: High school

Subject: Biology

Topic: Classification

Subtopic: Kingdom Eubacteria  

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