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State PSC Science & Technology — practice questions

Explore 248 free Science & Technology questions in State PSC Environment. Open each question or exercise to read its content, reference answers and available explanation.

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Science & Technology questions and exercises with answers

Showing questions 1–30 of 248.

Catch the Evil QuartetRead the answer and worked solution →Pop the levels of biodiversityRead the answer and worked solution →Find the real termRead the answer and worked solution →Slice the biodiversity wordsRead the answer and worked solution →In situ or ex situRead the answer and worked solution →Extinct, invasive or hotspotRead the answer and worked solution →Type the numberRead the answer and worked solution →Biodiversity 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 →

Worked practice questions

Catch the Evil Quartet

Read exercise and reference answers
Items
  1. Matches the category
    Yes
    Item
    Habitat loss
  2. Matches the category
    Yes
    Item
    Fragmentation
  3. Matches the category
    Yes
    Item
    Overexploit
  4. Matches the category
    Yes
    Item
    Alien species
  5. Matches the category
    Yes
    Item
    Co-extinction
  6. Matches the category
    No
    Item
    Pollination
  7. Matches the category
    No
    Item
    Seed banks
  8. Matches the category
    No
    Item
    Sacred groves
Category
Cause of loss
Instructions
Catch the causes of biodiversity loss. Let the conservation words fall.
_Source: syllabus Biology, Chapter 15, Biodiversity and Conservation._

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Pop the levels of biodiversity

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Other terms
  1. Seasonal
  2. Political
  3. Digital
Matching terms
  1. Genetic
  2. Species
  3. Ecological
Instructions
Pop the three levels at which biodiversity is measured.
_Source: syllabus Biology, Chapter 15, Biodiversity and Conservation._

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Find the real term

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Questions
  1. Correct
    Hotspot
    Choices
    1. Hotspot
    2. Hotspit
    3. Hotsput
  2. Correct
    Endemism
    Choices
    1. Endomism
    2. Endemism
    3. Endamism
  3. Correct
    In situ
    Choices
    1. Inn situ
    2. Ine situ
    3. In situ
  4. Correct
    Quagga
    Choices
    1. Quagga
    2. Quogga
    3. Quigga
  5. Correct
    Lantana
    Choices
    1. Lantona
    2. Lantana
    3. Lantuna
  6. Correct
    Biosphere
    Choices
    1. Bioshere
    2. Biosfere
    3. Biosphere
Instructions
Pick the lane with the real biodiversity term. The other two are made up.
_Source: syllabus Biology, Chapter 15, Biodiversity and Conservation._

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