Ecology and Environment
Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.
Organisms and Populations
SubtopicOrganisms and Populations under Ecology and Environment for Grade 12 ICSE.
Preview questions (no answers)
- 1.
Organisms that can tolerate and thrive in a wide range of temperatures are categorized as:
A.Stenothermal
B.Eurythermal
C.Stenohaline
D.Euryhaline
- 2.
In the following simplified food chain, which organism occupies the position of a secondary consumer?
A.Grass
B.Grasshopper
C.Frog
D.Snake
- 3.
Which of the following interactions represents a 'win-win' situation where both interacting species benefit from each other?
A.Commensalism
B.Amensalism
C.Mutualism
D.Parasitism
Download the worksheet for Ecology and Environment - Organisms and Populations to practice offline. It includes additional chapter-level practice questions.
Preview questions (no answers)
- 1.
Observe the simple grazing food chain provided in the diagram. Identify the organism that acts as the primary carnivore in this sequence.
A.Grass
B.Frog
C.Grasshopper
D.Snake
- 2.
According to Lindeman's 10% law, if the producers in an ecosystem fix of solar energy, how much energy will be available to the secondary consumers?
A.B.C.D. - 3.
In an aquatic ecosystem, which of the following organisms typically occupy the first trophic level?
A.Zooplankton
B.Phytoplankton
C.Benthic organisms
D.Small fishes
Download the worksheet for Ecology and Environment - Ecosystem to practice offline. It includes additional chapter-level practice questions.
Biodiversity and its Conservation
SubtopicBiodiversity and its Conservation under Ecology and Environment for Grade 12 ICSE.
Preview questions (no answers)
- 1.
Sacred groves, such as those found in the Khasi and Jaintia Hills of Meghalaya, are primarily used for:
A.Commercial timber production
B.Promoting eco-tourism in hilly regions
C.Regulating the local climate and rainfall
D.Conserving rare and threatened species of plants
- 2.
The Red Data Book, which contains a record of all endangered plants and animals, is maintained by which organization?
A.WWF
B.IUCN
C.UNESCO
D.CITES
- 3.
Which of the following is an example of an ex-situ conservation method for endangered species?
A.National Park
B.Biosphere Reserve
C.Wildlife Sanctuary
D.Botanical Garden
Download the worksheet for Ecology and Environment - Biodiversity and its Conservation to practice offline. It includes additional chapter-level practice questions.
Environmental Issues
SubtopicEnvironmental Issues under Ecology and Environment for Grade 12 ICSE.
Preview questions (no answers)
- 1.
Which of the following gases is considered a primary contributor to the 'Greenhouse Effect', accounting for approximately of global warming?
A.B.CFCs
C.D. - 2.
The phenomenon where the concentration of a non-biodegradable toxicant increases at successive trophic levels is known as:
A.Eutrophication
B.Bioremediation
C.Biomagnification
D.Bio-accumulation
- 3.
The thickness of the ozone layer in a column of air from the ground to the top of the atmosphere is measured in:
A.Dobson Units (DU)
B.Decibels (dB)
C.Parts per million (ppm)
D.Milligrams per liter (mg/L)
Download the worksheet for Ecology and Environment - Environmental Issues to practice offline. It includes additional chapter-level practice questions.