Biodiversity and Conservation Question Worksheet for Class 12: Concept Coverage, MCQ Pattern and Study Value

This Biology worksheet on Biodiversity and Conservation, prepared for Class 12 CBSE students, is mainly designed for board exam and NEET-oriented preparation. It contains 75 multiple-choice questions, all framed directly from NCERT concepts. The worksheet covers biodiversity levels, biodiversity hotspots, endemic and invasive species, conservation strategies, wildlife protection laws, biosphere reserves, extinction categories, ecosystem services, and important national and international conservation programmes. Overall, the worksheet reflects the kind of factual, concept-based, and application-oriented questions students regularly face in Class 12 board exams and competitive entrance tests Biodiversity and Conservation W….

I am writing about this worksheet because Biodiversity and Conservation is a chapter that looks theory-heavy but is actually very scoring if studied correctly. Students often struggle due to the large number of terms, examples, years, locations, and conservation categories involved. A well-structured worksheet like this helps convert NCERT text into exam-ready MCQs. By analysing the questions carefully, one can clearly identify which facts are repeatedly tested and how NCERT lines are converted into direct one-mark questions.

Structure of the Biodiversity and Conservation Worksheet

The worksheet consists of 75 MCQs, with each question carrying one mark. The questions are largely direct, but the options are closely framed, which tests accuracy and careful reading. The difficulty level ranges from easy to moderate, making it suitable for both revision and self-assessment before exams.

Most questions are fact-based, but many also test conceptual understanding, especially in areas like conservation strategies, extinction categories, and biodiversity patterns.

Biodiversity Levels and Species Diversity

Several questions focus on basic biodiversity concepts, including:

Genetic, species, and ecosystem diversity
Species richness and species evenness
Regions showing maximum and minimum biodiversity
Groups with highest species diversity such as insects and plants

These questions test whether students understand biodiversity as a measurable concept rather than just a definition.

Biodiversity Hotspots and Indian Regions

A significant part of the worksheet is dedicated to biodiversity hotspots and Indian geography. Questions include:

Identification of biodiversity hotspots in India
Western Ghats and Eastern Himalayas as hotspot regions
Endemism in restricted geographical areas
Regions with maximum biodiversity in the Indian subcontinent

Such questions are very common in board exams and NEET.

Endemic, Invasive and Keystone Species

The worksheet includes multiple questions on species classification, such as:

Meaning of endemism
Invasive alien species like Lantana, Eichhornia, and African catfish
Keystone species and their ecological importance
Species with high ecological impact despite low biomass

These questions test conceptual clarity and understanding of ecological balance.

Extinction, Threat Categories and Red Data Book

Several MCQs focus on extinction and conservation status. Topics covered include:

Extinct, endangered, vulnerable, and critically endangered species
Criteria used for classifying threatened species
Role of the Red Data Book
Examples of threatened and extinct animals like dodo and passenger pigeon

These questions require clear understanding of definitions and examples.

Download this Biodiversity and Conservation PDF File: Click Here

In Situ and Ex Situ Conservation Methods

Conservation strategies form a major section of the worksheet. Students are tested on:

In situ conservation through national parks, sanctuaries, and biosphere reserves
Ex situ conservation methods such as seed banks, cryopreservation, botanical gardens, and zoos
Differences between in situ and ex situ conservation
Zones of biosphere reserves including core, buffer, and transition zones

This is a high-weight area in exams.

National Parks, Sanctuaries and Conservation Projects

Many questions are based on Indian conservation efforts, including:

Kaziranga National Park and Indian rhinoceros
Periyar Wildlife Sanctuary
Dudhwa National Park
Project Tiger and Wildlife Protection Act
Sacred groves and protected areas

These questions test awareness of Indian biodiversity and conservation initiatives.

Ecosystem Services and Human Impact

The worksheet also includes questions on ecosystem services and human activities. Topics include:

Role of forests as lungs of the planet
Economic importance of biodiversity
Habitat loss, fragmentation, and overexploitation
Major causes of biodiversity loss in tropical regions

Such questions connect biology with environmental awareness.

International Conventions and Biodiversity Laws

Some MCQs test knowledge of global conservation efforts, such as:

Earth Summit held in Rio de Janeiro in 1992
Convention on Biological Diversity
Wildlife Protection Act amendments
Global biodiversity distribution across countries

These questions are frequently asked in competitive exams.

What Students Can Learn from This Worksheet

From analysing this worksheet, a few clear points emerge:

NCERT facts and examples are the backbone of questions
Years, locations, and species names must be revised carefully
Biodiversity hotspots and conservation methods are high-scoring areas
Understanding definitions prevents confusion between similar terms
Regular MCQ practice improves speed and accuracy

Overall, this Class 12 Biodiversity and Conservation worksheet is a strong revision resource for board exams and NEET preparation. It helps students organise NCERT content into exam-friendly questions and builds confidence in handling one-mark MCQs from this chapter.

Class 11 Geography Chapter 12 Hindi PDF: महासागरीय जल

NCERT Class 11 Geography Chapter 12, महासागरीय जल, focuses on the physical characteristics and movement of ocean water. This chapter explains why oceans are not just large water bodies but active systems that influence climate, weather, marine life, and even human activities. Students learn about temperature, salinity, density, and different types of ocean movements like waves, tides, and currents, all of which play a key role in shaping the Earth’s environment.

I am writing about this chapter because many students find oceanography concepts confusing at first, especially topics like salinity variation and ocean currents. Chapter 12 simplifies these ideas by linking them with real examples such as warm and cold currents, tidal movements, and their effects on coastal regions. This chapter is important not only from an exam point of view but also for understanding how oceans regulate Earth’s climate. For Class 11 students, this topic builds a strong base for later chapters on climate, natural vegetation, and even disaster studies. Once you understand this chapter well, Geography starts to feel more logical and connected to real life.

What This Chapter Is About

Chapter 12 explains the nature of ocean water and how its properties and movements affect the Earth. It connects oceans with atmosphere, climate, and human life.

Temperature of Ocean Water

This section explains how ocean water temperature changes with:

Latitude
Seasons
Depth of the ocean

Students learn why surface water is warmer and why temperature decreases as we go deeper. These concepts are often tested in short answers.

Salinity of Ocean Water

Salinity refers to the amount of dissolved salts in ocean water. The chapter explains:

Factors affecting salinity
Why salinity is higher in some seas
Differences between open oceans and enclosed seas

Examples like the Red Sea and Baltic Sea help students remember answers easily.

Density of Ocean Water

Density depends on temperature and salinity. This section explains how density differences lead to vertical movement of water, which further influences ocean circulation.