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Ecology and Environment

Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.

Organisms and Populations

Subtopic

Organisms and Populations under Ecology and Environment for Grade 12 ICSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Brood parasitism, where one bird lays eggs in the nest of another, is most commonly seen between:

    A.

    Sparrow and Pigeon

    B.

    Cuckoo and Crow

    C.

    Eagle and Vulture

    D.

    Parrot and Myna

  2. 2.

    Polar seals have a thick layer of fat underneath their skin that acts as an insulator; this layer is called:

    A.

    Chitin

    B.

    Cuticle

    C.

    Blubber

    D.

    Epidermis

  3. 3.

    Which of the following environmental factors is considered the most ecologically relevant?

    A.

    Light

    B.

    Water

    C.

    Temperature

    D.

    Soil

Download the worksheet for Ecology and Environment - Organisms and Populations to practice offline. It includes additional chapter-level practice questions.

Ecosystem

Subtopic

Ecosystem under Ecology and Environment for Grade 12 ICSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Which of the following is a sedimentary nutrient cycle?

    A.

    Carbon cycle

    B.

    Nitrogen cycle

    C.

    Phosphorus cycle

    D.

    Oxygen cycle

  2. 2.

    Which of the following is the correct sequence of processes in decomposition?

    A.

    Fragmentation →\rightarrow Leaching →\rightarrow Catabolism →\rightarrow Humification →\rightarrow Mineralization

    B.

    Mineralization →\rightarrow Humification →\rightarrow Catabolism →\rightarrow Leaching →\rightarrow Fragmentation

    C.

    Humification →\rightarrow Mineralization →\rightarrow Fragmentation →\rightarrow Leaching →\rightarrow Catabolism

    D.

    Catabolism →\rightarrow Fragmentation →\rightarrow Leaching →\rightarrow Mineralization →\rightarrow Humification

  3. 3.

    Ecological pyramids were first developed by which of the following ecologists?

    A.

    Charles Elton

    B.

    Ramdeo Misra

    C.

    G. Evelyn Hutchinson

    D.

    Arthur Tansley

Download the worksheet for Ecology and Environment - Ecosystem to practice offline. It includes additional chapter-level practice questions.

Biodiversity and its Conservation

Subtopic

Biodiversity and its Conservation under Ecology and Environment for Grade 12 ICSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    The diversity of ecosystems like deserts, rainforests, mangroves, and coral reefs in India is a measure of:

    A.

    Genetic diversity

    B.

    Species diversity

    C.

    Ecological diversity

    D.

    Alpha diversity

  2. 2.

    Which of the following is an example of an invasive aquatic weed that has caused havoc in Indian wetlands, often called 'Terror of Bengal'?

    A.

    Lotus

    B.

    Hydrilla

    C.

    Water Hyacinth (Eichhornia)

    D.

    Vallisneria

  3. 3.

    Which of the following is a bird species from Russia that recently became extinct?

    A.

    Dodo

    B.

    Quagga

    C.

    Steller's Sea Cow

    D.

    Passenger Pigeon

Download the worksheet for Ecology and Environment - Biodiversity and its Conservation to practice offline. It includes additional chapter-level practice questions.

Environmental Issues

Subtopic

Environmental Issues under Ecology and Environment for Grade 12 ICSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    The Environment (Protection) Act of India was enacted in which year?

    A.

    1972

    B.

    1981

    C.

    1986

    D.

    1991

  2. 2.

    Which of the following contributes about 14%14\% to the total global warming?

    A.

    Methane

    B.

    CFCsCFCs

    C.

    N2ON_2O

    D.

    CO2CO_2

  3. 3.

    In the context of the environment, what does the term 'Reforestation' refer to?

    A.

    Clearing a forest to build roads

    B.

    Restoring a forest that once existed but was removed

    C.

    Converting a desert into a forest for the first time

    D.

    Using forest land for agriculture

Download the worksheet for Ecology and Environment - Environmental Issues to practice offline. It includes additional chapter-level practice questions.