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UPSC CDS Environment & Ecology — practice questions — page 4

Explore 308 free Environment & Ecology questions in UPSC CDS Environment. Open each question or exercise to read its content, reference answers and available explanation.

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Environment & Ecology questions and exercises with answers

Showing questions 91–120 of 308.

Catch the escapes in timeRead the answer and worked solution →Pop the population interactionsRead the answer and worked solution →Run the adaptationsRead the answer and worked solution →Slice the population wordsRead the answer and worked solution →Grow or shrinkRead the answer and worked solution →Sort the interactionsRead the answer and worked solution →Type the numberRead the answer and worked solution →Organisms and populations bingoRead the answer and worked solution →A thermal power plant wants to remove over 99 per cent of particulate matter from its exhaust. It should install a:Read the answer and worked solution →A factory needs to remove sulphur dioxide from its exhaust. The device for this is a:Read the answer and worked solution →Which particulate size class does the Central Pollution Control Board blame for the greatest harm to health?Read the answer and worked solution →Catalytic converters in cars use which expensive metals as catalysts?Read the answer and worked solution →A car with a catalytic converter must use unleaded petrol because lead:Read the answer and worked solution →The Air (Prevention and Control of Pollution) Act was amended in 1987 to include:Read the answer and worked solution →A jet plane taking off can damage ear drums with a brief exposure to sound of:Read the answer and worked solution →Delhi converted its entire bus fleet to CNG by the end of:Read the answer and worked solution →The Water (Prevention and Control of Pollution) Act of India was passed in:Read the answer and worked solution →The amount of biodegradable organic matter in sewage is estimated by measuring:Read the answer and worked solution →Water hyacinth, the world's most problematic aquatic weed, is also called:Read the answer and worked solution →Heavy metals in industrial effluent are defined as elements with density greater than:Read the answer and worked solution →Starting at 0.003 ppb in water, DDT can reach what level in fish-eating birds?Read the answer and worked solution →High DDT in birds thins eggshells by disturbing the metabolism of:Read the answer and worked solution →The natural ageing of a lake by nutrient enrichment is called:Read the answer and worked solution →Arcata in California cleans its wastewater through a series of:Read the answer and worked solution →A fine powder of recycled modified plastic mixed with bitumen to lay roads is:Read the answer and worked solution →Ramesh Chandra Dagar of Sonipat is known for:Read the answer and worked solution →Without the greenhouse effect, the average surface temperature of Earth would be about:Read the answer and worked solution →The Montreal Protocol to control ozone-depleting substances was signed in:Read the answer and worked solution →The National Forest Policy of 1988 recommends what forest cover for the hills?Read the answer and worked solution →In 1974 the women of Garhwal hugged trees to stop contractors, in the movement called:Read the answer and worked solution →

Worked practice questions

Catch the escapes in time

Read exercise and reference answers
Items
  1. Matches the category
    Yes
    Item
    Hibernation
  2. Matches the category
    Yes
    Item
    Aestivation
  3. Matches the category
    Yes
    Item
    Diapause
  4. Matches the category
    Yes
    Item
    Spores
  5. Matches the category
    No
    Item
    Migration
  6. Matches the category
    No
    Item
    Natality
  7. Matches the category
    No
    Item
    Blubber
  8. Matches the category
    No
    Item
    Allen Rule
Category
Escape in time
Instructions
Catch the ways organisms suspend activity to survive. Let the others fall.
_Source: syllabus Biology, Chapter 13, Organisms and Populations._

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Pop the population interactions

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Other terms
  1. Eurythermal
  2. Blubber
  3. Diapause
  4. Natality
Matching terms
  1. Mutualism
  2. Predation
  3. Parasitism
  4. Amensalism
  5. Competition
  6. Commensalism
Instructions
Pop the names of interactions between species. Leave the other words.
_Source: syllabus Biology, Chapter 13, Organisms and Populations._

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Run the adaptations

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Questions
  1. Correct
    Kangaroo rat
    Choices
    1. Kangaroo rat
    2. Opuntia
    3. Seal
  2. Correct
    Opuntia
    Choices
    1. Kangaroo rat
    2. Opuntia
    3. Seal
  3. Correct
    Seal
    Choices
    1. Kangaroo rat
    2. Opuntia
    3. Seal
  4. Correct
    Natality
    Choices
    1. Natality
    2. Mortality
    3. Emigration
  5. Correct
    Mortality
    Choices
    1. Natality
    2. Mortality
    3. Emigration
  6. Correct
    Emigration
    Choices
    1. Natality
    2. Mortality
    3. Emigration
Instructions
Who: water from fat oxidation, spines instead of leaves, blubber; then births, deaths, leaving a habitat.
_Source: syllabus Biology, Chapter 13, Organisms and Populations._

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