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State PSC Organisations — practice questions

Explore 30 free Organisations questions in State PSC Geography. Open each question or exercise to read its content, reference answers and available explanation.

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Organisations questions and exercises with answers

Showing questions 1–30 of 30.

Biodiversity today is the result of how many billion years of evolution?Read the answer and worked solution →The best estimate of the number of species on earth is:Read the answer and worked solution →What share of all species that ever lived on earth are extinct today?Read the answer and worked solution →Biodiversity is consistently richer in the:Read the answer and worked solution →Biodiversity is discussed at how many levels?Read the answer and worked solution →Variation of genes within a species is called:Read the answer and worked solution →Areas that are rich in species diversity are called:Read the answer and worked solution →Biodiversity plays which three roles?Read the answer and worked solution →Crop diversity is also called:Read the answer and worked solution →Tropical regions occupy about what share of the world's total area?Read the answer and worked solution →Tropical rain forests contain about what share of the species on earth?Read the answer and worked solution →Species introduced into a habitat that are not its natural inhabitants are called:Read the answer and worked solution →The IUCN classifies threatened species into how many categories?Read the answer and worked solution →The IUCN publishes information on endangered species worldwide as the:Read the answer and worked solution →Species likely to be in danger of extinction in the near future are classed as:Read the answer and worked solution →Species whose world population is very small and confined to limited areas are:Read the answer and worked solution →India signed the Convention of Biodiversity at the Earth Summit in Rio de Janeiro in:Read the answer and worked solution →How many other nations joined India in signing the Convention of Biodiversity?Read the answer and worked solution →The Wild Life (Protection) Act of India was passed in:Read the answer and worked solution →Tropical countries holding a large share of the world's species are called:Read the answer and worked solution →How many mega diversity countries are there?Read the answer and worked solution →In Madagascar, about what share of plants and animals are found nowhere else?Read the answer and worked solution →Catch the mega diversity countriesRead the answer and worked solution →Pop the threat categoriesRead the answer and worked solution →Run the conservation numbersRead the answer and worked solution →Slice the biodiversity wordsRead the answer and worked solution →Threat or protectionRead the answer and worked solution →Sort the diversity levelsRead the answer and worked solution →Type the numberRead the answer and worked solution →Biodiversity bingoRead the answer and worked solution →

Worked practice questions

Biodiversity today is the result of how many billion years of evolution?

  1. 2.5 to 3.5
  2. 1.5 to 2.5
  3. 4.5 to 5.5
  4. 6.5 to 7.5
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Correct answer: A. 2.5 to 3.5

1. Before humans the earth held more biodiversity than ever. 2. It took 2.5 to 3.5 billion years. 3. Extinction has sped up since humans emerged. _Source: syllabus Fundamentals of Physical Geography, Chapter 16, Biodiversity and Conservation._

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The best estimate of the number of species on earth is:

  1. 1 billion
  2. 10 million
  3. 2 million
  4. 100 million
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Correct answer: B. 10 million

1. Estimates range from 2 million to 100 million. 2. 10 million is the best estimate. 3. New species are discovered regularly. _Source: syllabus Fundamentals of Physical Geography, Chapter 16, Biodiversity and Conservation._

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What share of all species that ever lived on earth are extinct today?

  1. 99 per cent
  2. 50 per cent
  3. 10 per cent
  4. 75 per cent
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Correct answer: A. 99 per cent

1. A species lasts one to four million years on average. 2. 99 per cent of species ever are extinct. 3. Biodiversity is in constant evolution. _Source: syllabus Fundamentals of Physical Geography, Chapter 16, Biodiversity and Conservation._

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