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State PSC Environment & Ecology — practice questions — page 3

Explore 332 free Environment & Ecology questions in State PSC 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 61–90 of 332.

Type the numberRead the answer and worked solution →Forests bingoRead the answer and worked solution →Gross primary productivity minus respiration losses equals:Read the answer and worked solution →Annual net primary productivity of the whole biosphere is about:Read the answer and worked solution →Despite covering 70 per cent of the surface, oceans produce only how much of the biosphere's net primary productivity?Read the answer and worked solution →Earthworms breaking detritus into smaller particles is called:Read the answer and worked solution →Water-soluble inorganic nutrients going down into the soil and precipitating as unavailable salts is:Read the answer and worked solution →Release of inorganic nutrients from humus by microbes is called:Read the answer and worked solution →Decomposition is slower when detritus is rich in:Read the answer and worked solution →Less than what share of incident solar radiation is photosynthetically active radiation?Read the answer and worked solution →Plants capture only what share of PAR?Read the answer and worked solution →Decomposers that degrade dead organic matter are also called:Read the answer and worked solution →In an aquatic ecosystem, the major conduit for energy flow is the:Read the answer and worked solution →Energy transfer between trophic levels follows the:Read the answer and worked solution →Which ecological pyramid is always upright and can never be inverted?Read the answer and worked solution →The pyramid of biomass in the sea is generally:Read the answer and worked solution →The stable end community of succession, in near equilibrium with the environment, is the:Read the answer and worked solution →Succession starting on bare rock or newly cooled lava is:Read the answer and worked solution →Plant succession in wet areas is called:Read the answer and worked solution →Pioneer species in primary succession on rocks are usually:Read the answer and worked solution →Nutrient cycling is also called:Read the answer and worked solution →Carbon makes up what share of the dry weight of organisms?Read the answer and worked solution →What share of global carbon is dissolved in the oceans?Read the answer and worked solution →Robert Constanza's team priced ecosystem services at about how much a year?Read the answer and worked solution →Catch the decomposition stepsRead the answer and worked solution →Pop the succession wordsRead the answer and worked solution →Run the ecosystem numbersRead the answer and worked solution →Slice the ecosystem wordsRead the answer and worked solution →Gaseous or sedimentary cycleRead the answer and worked solution →Sort producers, consumers and decomposersRead the answer and worked solution →

Worked practice questions

Type the number

Read exercise and reference answers
Questions
  1. Answer
    1972
    Question
    Year of the Wildlife Act
  2. Answer
    1973
    Question
    Year Project Tiger started
  3. Answer
    1992
    Question
    Year Project Elephant started
  4. Answer
    9
    Question
    Tiger reserves at the start of Project Tiger
  5. Answer
    44
    Question
    Tiger reserves now
  6. Answer
    18
    Question
    Biosphere Reserves in India
Instructions
Type the number only.
_Source: syllabus Geography, India Physical Environment, Chapter 5, Natural Vegetation._

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Forests bingo

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Clues and terms
  1. Clue
    Over 200 cm rain, trees 60 m tall.
    Item
    Evergreen
  2. Clue
    Deciduous, 70 to 200 cm rain.
    Item
    Monsoon forest
  3. Clue
    Under 50 cm rain; babool and khejri.
    Item
    Thorn
  4. Clue
    Temperate forest of the Nilgiris.
    Item
    Shola
  5. Clue
    Endemic timber of the west Himalaya.
    Item
    Deodar
  6. Clue
    Convention protecting wetlands.
    Item
    Ramsar
  7. Clue
    Mangrove forest of West Bengal.
    Item
    Sunderbans
  8. Clue
    Launched in 1973 with nine reserves.
    Item
    Project Tiger
  9. Clue
    First biosphere reserve, 1986.
    Item
    Nilgiri BR
Instructions
Read each clue and tap the term it describes.
_Source: syllabus Geography, India Physical Environment, Chapter 5, Natural Vegetation._

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Gross primary productivity minus respiration losses equals:

  1. Net primary productivity
  2. Secondary productivity
  3. Standing crop biomass
  4. Gross ecosystem output
Show answer and solution

Correct answer: A. Net primary productivity

1. Plants use much of GPP in respiration. 2. GPP minus R gives NPP. 3. NPP is the biomass available to heterotrophs. _Source: syllabus Biology, Chapter 14, Ecosystem._

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