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UPSC CDS Current Affairs — practice questions — page 5

Explore 180 free Current Affairs questions in UPSC CDS Science. Open each question or exercise to read its content, reference answers and available explanation.

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Current Affairs questions and exercises with answers

Showing questions 121–150 of 180.

Who was the earliest to classify plants into trees, shrubs and herbs on a scientific basis?Read the answer and worked solution →Who proposed the Five Kingdom Classification in 1969?Read the answer and worked solution →Bacteria are the sole members of which kingdom?Read the answer and worked solution →Rod-shaped bacteria are called:Read the answer and worked solution →Archaebacteria living in extremely salty areas are called:Read the answer and worked solution →Which archaebacteria in the gut of cows produce methane from dung?Read the answer and worked solution →Nostoc and Anabaena fix atmospheric nitrogen in specialised cells called:Read the answer and worked solution →The smallest known living cells, which completely lack a cell wall, are:Read the answer and worked solution →All single-celled eukaryotes are placed in which kingdom?Read the answer and worked solution →Diatom cell walls are indestructible because they are embedded with:Read the answer and worked solution →Gritty deposits of diatom cell walls, used in polishing and filtering oils, are called:Read the answer and worked solution →Red tides that kill fish are caused by rapid multiplication of red:Read the answer and worked solution →Euglenoids lack a cell wall and instead have a flexible protein-rich layer called the:Read the answer and worked solution →The parasite causing sleeping sickness, a flagellated protozoan, is:Read the answer and worked solution →The network of thread-like hyphae that forms a fungal body is called the:Read the answer and worked solution →A fungus living with the roots of higher plants forms an association called:Read the answer and worked solution →The wheat rust fungus Puccinia and the mushroom Agaricus belong to which fungal class?Read the answer and worked solution →Ascomycetes are commonly known as:Read the answer and worked solution →Who first recognised viruses as the cause of tobacco mosaic disease in 1892?Read the answer and worked solution →Viruses that infect plants generally have which genetic material?Read the answer and worked solution →Viroids, discovered by T.O. Diener in 1971, differ from viruses in lacking a:Read the answer and worked solution →Mad cow disease is caused by an infectious agent made of abnormally folded protein called a:Read the answer and worked solution →Catch the protistsRead the answer and worked solution →Pop the fungiRead the answer and worked solution →Run the virus discoveriesRead the answer and worked solution →Slice the classification wordsRead the answer and worked solution →Prokaryote or eukaryoteRead the answer and worked solution →Sort the kingdomsRead the answer and worked solution →Type the numberRead the answer and worked solution →Biological classification bingoRead the answer and worked solution →

Worked practice questions

Who was the earliest to classify plants into trees, shrubs and herbs on a scientific basis?

  1. Aristotle
  2. Linnaeus
  3. Whittaker
  4. Ivanowsky
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Correct answer: A. Aristotle

1. He also split animals by red blood or not. 2. Aristotle used simple morphological characters. 3. Linnaeus later gave two kingdoms. _Source: syllabus Biology, Chapter 2, Biological Classification._

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Who proposed the Five Kingdom Classification in 1969?

  1. W.M. Stanley
  2. R.H. Whittaker
  3. Carl Linnaeus
  4. T.O. Diener
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Correct answer: B. R.H. Whittaker

1. The kingdoms are Monera, Protista, Fungi, Plantae, Animalia. 2. Whittaker proposed it in 1969. 3. Criteria included cell structure and nutrition. _Source: syllabus Biology, Chapter 2, Biological Classification._

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Bacteria are the sole members of which kingdom?

  1. Monera
  2. Fungi
  3. Plantae
  4. Viruses
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Correct answer: A. Monera

1. They are the most abundant microorganisms. 2. Kingdom Monera holds only bacteria. 3. They live even in hot springs and deep oceans. _Source: syllabus Biology, Chapter 2, Biological Classification._

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