Biology Chapter 12 – Major Ecosystems (Class 12) for FSC, Entry Tests & NTS Preparation
Chapter 12, Major Ecosystems, is an important topic for Class 12 students preparing for FSC board exams, medical/engineering entry tests like MDCAT, NUMS, AKU, NUST, ECAT, UET, and NTS exams. This chapter explains the different types of ecosystems on Earth, their characteristics, biodiversity, and ecological significance. Understanding major ecosystems is essential for studying ecology, conservation, and environmental management.
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Which statement about profundal zone is correct?
Annual rainfall in grass land i
Zone of lake water which is of open water near the surface is
Which statement is incorrect?
Desert ecosystem of Mianwali is
In which zone plant community is most diverse
In polluted lake which organisms dominate the community
Coniferous forests located at high altitude are called
Ecosystem of Shogran is
Weather refers to
Temperature of temperate deciduous forests is
Which statement about hydrospheric ecosystem is incorrect?
One of the most important cause of desertification is
Evolution of vascular bundles in plants and skeleton in animals is an adaptation for
Productivity of an ecosystem is indicated by
Development of bark in plants and skin in animals is a method for
Eutrophication is
End of earth’ is related to
Mountains of Koh Hindukush come under
Key Concepts about Major Ecosystems
The chapter explains terrestrial ecosystems such as forests, deserts, grasslands, and tundra, as well as aquatic ecosystems including freshwater and marine environments. It covers the structure, climate, flora, and fauna of each ecosystem and highlights their ecological roles in energy flow, nutrient cycling, and habitat provision. Human impacts on these ecosystems, such as deforestation, overfishing, and pollution, are also discussed. Each concept is explained with examples, characteristics, and significance in maintaining ecological balance. These concepts are highly important for FSC board exams, medical/engineering entry tests like MDCAT, NUMS, AKU, NUST, ECAT, UET, and NTS.
Free Entry Test & NTS Preparation
Mastery of major ecosystems helps students understand biodiversity, ecological interactions, and the importance of environmental conservation. PLS Academy provides practice questions, solved past papers, and chapter-wise MCQs to help students revise these topics effectively. Regular study of this chapter improves problem-solving skills, conceptual clarity, and exam performance, ensuring students are well-prepared for FSC board exams, competitive entry tests, and NTS exams.
JazakAllah.
