Login / Register
Follow Us
0
0
Register Free!
Register Free!
Online Mock Tests & Exam Preparation | Target Exams
Select Medium:
🇬🇧 English Medium Active 🇮🇳 বাংলা মাধ্যম 🇮🇳 हिन्दी माध्यम
West Bengal Council of Higher Secondary Education (WBCHSE) Class 12 (Higher Secondary) Biology Set 02 (Advanced Level) English Medium 100% Free Practice Test

West Bengal Council of Higher Secondary Education (WBCHSE) Class 12 (Higher Secondary) Biology: Organisms and Populations Online Test (Set 02 (Advanced Level))

Organisms and Populations — Set 02 (Advanced Level)

Practise free online CBT mock test for West Bengal Council of Higher Secondary Education (WBCHSE) Class 12 (Higher Secondary) Biology Chapter 11 'Organisms and Populations'. 20 MCQs, 20-minute timer, instant scorecard, and step-by-step solutions aligned with official board syllabus.

📝
20 MCQs
Questions
⏱️
20 Mins
Duration
🎯
20 Marks
Total Marks
➕
+1.0
Per Correct
🛡️
0.0
Negative Mark
🌐
English
Language
Start Test Now (English Medium)
Instant Scorecard Step-by-Step Solutions WBCHSE HS Syllabus Pattern

Chapter Study Guide & In-Depth Notes

Master the key concepts, vocabulary, and high-yield questions before starting the test.

3 Sections

Chapter Overview & Core Concepts: Organisms and Populations

Class 12 Study Guide

Mastering Organisms and Populations in Class 12 provides critical subject intuition, analytical skills, and examination readiness.

Examinations test fundamental principles, definitions, cause-and-effect reasoning, and real-world applications under timed conditions.

Core Moral & Key Takeaway:

Grasping core concepts and practicing with timed chapter-wise CBT tests guarantees top performance in board exams.

Key Terminology, Definitions & Principles

Glossary & Concepts
Term / Formula Type Definition / Meaning Explanation / Notes Example / Usage
Core Concept Principle Primary concept governing Organisms and Populations. मुख्य सिद्धांत "Understand and apply the principle accurately."
Analytical Deduction Skill Evaluating evidence to draw correct conclusions. तार्किक विश्लेषण "Examine question clues systematically."

Key Features & Devices Explored:

Systematic Elimination
Eliminate distractor choices before selecting the best answer.
Pacing & Accuracy
Complete each question within 60 seconds to maintain steady momentum.

High-Yield Revision Points & Solved Board Exam Q&A

Revision Notes
⚡ High-Yield Exam Takeaways:
  • Review all key textbook terms, definitions, and formulas.
  • Pay attention to units, boundary values, and key keywords in questions.
  • Solve Foundation Set 01 to build confidence, followed by Advanced Set 02 for exam excellence.
Frequently Asked Questions & Model Answers:
Q1 How should students prepare for Organisms and Populations exams?
Answer: Read the chapter thoroughly, practice step-by-step solved examples, memorize key definitions, and evaluate preparation using timed online CBT mock tests.

Sample Questions Preview

Free Sneak Peek

Here is a sneak peek of the questions included in this test set. Test your preparation by viewing the answer and detailed explanation before starting the timed exam.

Q1
What are Eurythermal vs Stenothermal organisms, and Euryhaline vs Stenohaline organisms?
ইউরিথার্মাল ও স্টেনোথার্মাল এবং ইউরিহ্যালাইন ও স্টেনোহ্যালাইন জীবের মধ্যে পার্থক্য কী?
यूरीथर्मल बनाम स्टेनोथर्मल जीव और यूरीहैलाइन बनाम स्टेनोहैलाइन जीव क्या हैं?
A
Eurythermal lives only at 100°Cইউরিথার্মাল কেবল ১০০°C-এ থাকেयूरीथर्मल केवल 100°C पर रहता है
B
Stenohaline lives in pure alcoholস্টেনোহ্যালাইন অ্যালকোহলে বাঁচেस्टेनोहेलिन शुद्ध अल्कोहल में रहता है
C
All marine fish are euryhalineসব সামুদ্রিক মাছ ইউরিহ্যালাইনसभी समुद्री मछलियाँ यूरीहैलाइन होती हैं
D
Eurythermal: Tolerate a WIDE RANGE of temperatures; Stenothermal: Restricted to a NARROW RANGE of temperatures; Euryhaline: Tolerate WIDE salinity fluctuations; Stenohaline: Restricted to NARROW salinity rangeইউরিথার্মাল: তাপমাত্রার ব্যাপক তারতম্য সহ্য করতে পারে; স্টেনোথার্মাল: সংকীর্ণ তাপমাত্রায় সীমাবদ্ধ; ইউরিহ্যালাইন: লবণের ব্যাপক তারতম্য সহ্যকারী; স্টেনোহ্যালাইন: সংকীর্ণ লবণাক্ততায় সীমাবদ্ধयूरीथर्मल: तापमान की एक विस्तृत श्रृंखला को सहन करता है; स्टेनोथर्मल: तापमान की एक संकीर्ण सीमा तक सीमित; यूरीहैलाइन: व्यापक लवणता के उतार-चढ़ाव को सहन करता है; स्टेनोहेलिन: संकीर्ण लवणता सीमा तक सीमित
Correct Answer: Option D
Explanation:
Eurythermal/Euryhaline species tolerate broad\vecological ranges (wide thermal/salinity resilience). Stenothermal/Stenohaline organisms are restricted to narrow environmental ranges.
ব্যাপক তাপমাত্রা সহ্যকারীরা ইউরিথার্মাল এবং সংকীর্ণ সীমার মধ্যে আবদ্ধরা স্টেনোথার্মাল হিসেবে পরিচিত।
यूरीथर्मल/यूरीहैलाइन प्रजातियां व्यापक पारिस्थितिक रेंज (व्यापक तापीय/लवणता लचीलापन) को सहन करती हैं। स्टेनोथर्मल/स्टेनोहेलिन जीव संकीर्ण पर्यावरणीय सीमाओं तक ही सीमित हैं।
Q2
What are Hibernation, Aestivation, and Diapause as mechanisms to escape unfavorable environmental conditions in time?
প্রতিকূল পরিবেশ এড়াতে শীতঘুম (Hibernation), গ্রীষ্মঘুম (Aestivation) এবং ডায়াপজ (Diapause) বলতে কী বোঝায়?
समय पर प्रतिकूल पर्यावरणीय परिस्थितियों से बचने के तंत्र के रूप में हाइबरनेशन, एस्टिवेशन और डायपॉज क्या हैं?
A
All three mean migration to Africaতিনটিই পরিযানइन तीनों का मतलब अफ्रीका में प्रवासन है
B
Hibernation: Winter sleep to escape cold (e.g., Bears); Aestivation: Summer sleep to escape heat and desiccation (e.g., Snails, Lungfish); Diapause: A stage of suspended physiological development in ZOOPLANKTONশীতঘুম: অতিরিক্ত ঠান্ডায় শীতকালীন নিষ্ক্রিয়তা (ভালুক); গ্রীষ্মঘুম: তীব্র গরমে গ্রীষ্মকালীন নিষ্ক্রিয়তা (শামুক, লাংফিশ); ডায়াপজ: জুওপ্লাঙ্কটনের সাময়িক বিকাশ স্থগিতাবস্থাशीतनिद्रा: ठंड से बचने के लिए शीतकालीन नींद (उदाहरण के लिए, भालू); सौंदर्यीकरण: गर्मी और शुष्कता से बचने के लिए ग्रीष्मकालीन नींद (उदाहरण के लिए, घोंघे, लंगफिश); डायपॉज: ज़ूप्लैंकटन में निलंबित शारीरिक विकास का एक चरण
C
All three mean permanent deathতিনটিই স্থায়ী মৃত্যুइन तीनों का मतलब स्थायी मृत्यु है
D
Diapause is seen in lionsডায়াপজ সিংহতে দেখা যায়शेरों में डायपॉज देखा जाता है
Correct Answer: Option B
Explanation:
Organisms escape in time via dormancy: Hibernation (polar bears escaping winter freeze), Aestivation (desert snails escaping summer heat/desiccation), and Diapause (zooplankton arresting embryonic development in lakes).
প্রতিকূল ঋতুতে বিপাক ক্রিয়ার হার সর্বনিম্ন করে ঘুমিয়ে সময় পার করাই হলো শীতঘুম ও গ্রীষ্মঘুম।
सुप्तावस्था के माध्यम से जीव समय के साथ बच निकलते हैं: हाइबरनेशन (सर्दियों की ठंड से बचने के लिए ध्रुवीय भालू), एस्टिवेशन (गर्मी की गर्मी/शुष्कता से बचने के लिए रेगिस्तानी घोंघे), और डायपॉज (झीलों में भ्रूण के विकास को रोकने वाला ज़ोप्लांकटन)।

Ready to attempt all 20 questions in exam environment?

Get real-time countdown timer, question palette navigator, and instant analytics.

How Chapter-Wise Online CBT Tests Build Winning Habits for Future Competitive Exams

Focused chapter-wise CBT practice builds the speed, mental stamina, and analytical discipline required to ace CUET, JEE Main, NEET UG, NDA, CA Foundation, and College Entrance Exams.

Competitive Edge

Real-Time Clock Awareness & Pacing

समय प्रबंधन एवं गति नियंत्रण

In school examinations, students write answers without active pacing. In national entrance tests, students have barely 45-60 seconds per MCQ. Practicing with a 20-minute timer instills instinctive time-budgeting and prevents last-minute exam panic.

Mastery of the Elimination Technique

विकल्प निष्कासन विधि में दक्षता

Top rankers in competitive exams rarely compute every problem blindly. They spot subtle traps, evaluate extreme values, and eliminate 2 out of 4 distractors within seconds. Our 4-option sets teach critical distractor analysis.

CBT Screen Stamina & Digital Comfort

कंप्यूटर आधारित परीक्षा का सहज अभ्यास

Almost all major national exams (CUET, JEE, NEET, SSC, Banking) are 100% computer-based. Students who only study on paper experience eye strain and navigation mistakes on exam day. Early CBT practice creates effortless digital fluency.

Immunity to Negative Marking

सटीकता और नकारात्मक अंकन से सुरक्षा

Careless errors—such as misreading "NOT" or "EXCEPT"—ruin thousands of competitive aspirations each year. Regular objective testing builds the habit of double-checking question keywords before locking answers.

Instant Diagnostic Feedback Loop

तत्काल त्रुटि निवारण एवं आत्म-मूल्यांकन

Traditional paper tests take weeks to grade, by which time the student has forgotten their thought process. TargetExams provides instant scorecards and step-by-step solutions while the conceptual puzzle is still fresh.

Start Building Your Competitive Edge from Class

Develop speed, accuracy, and digital test-taking confidence with chapter-wise 20-minute mocks.

Syllabus Concepts Evaluated in this Chapter

This test series specifically evaluates the core competencies and learning objectives outlined in the official syllabus:

  • Core definitions, fundamental theorems, and essential concepts of this chapter.
  • Step-by-step mathematical reasoning and deductive problem-solving.
  • Application of standard formulas and operations in real-world scenarios.
  • Critical examination of common exam pitfalls and misleading options.
  • Higher-order thinking skill (HOTS) questions to prepare for school examinations.
  • Speed and accuracy mastery under standard timed CBT exam conditions.

Exam Rules & Test Taking Guidelines

  • Total Questions: The test consists of exactly 20 objective type questions.
  • Time Allowed: 20 Minutes countdown timer begins as soon as the test launches.
  • Marking Scheme: +1.0 mark is awarded for each correct answer.
  • Zero Penalty: There is 0.0 negative marking for incorrect or unattempted questions.
  • Question Palette: Freely navigate between questions and flag questions for later review.
  • Review & Solutions: Access instant scorecard and full step-by-step solutions upon submission.

Frequently Asked Questions (FAQs)

Yes! Foundation Practice Set 01 for every chapter in West Bengal Council of Higher Secondary Education (WBCHSE) Class 12 (Higher Secondary) Biology is 100% free to attempt. Students can test their preparation without any subscription or payment.
This test strictly follows the official West Bengal Council of Higher Secondary Education (WBCHSE) syllabus and curriculum for Class 12 (Higher Secondary), covering textbook concepts, formulas, and board-standard MCQs for Chapter 11.
This dedicated test page is conducted in English Medium. If you prefer taking the test in Bengali or Hindi, you can switch using the language switcher bar at the top or toggle languages during the exam.
The test comprises 20 MCQs to be completed in 20 minutes. Each question carries +1.0 mark for a correct response, and there is 0.0 negative marking for incorrect or unattempted questions.
Yes! Instantly after submitting your test, you receive a comprehensive digital scorecard with accuracy analysis, time breakdown, and step-by-step verified explanations for all 20 questions.

Practice Sets in this Chapter

Set 01 (Foundation)

20 MCQs • 20 Mins
View

Set 02 (Advanced)

20 MCQs • 20 Mins
Current

More Chapters in this Subject

🎯 Start Preparation

Begin with this 20-minute practice set to test your conceptual accuracy and prepare for top ranks in your school examinations.

Organisms and Populations (Set 02 (Advanced Level))
20 MCQs • 20 Mins • 100% Free Practice Test

Select Test Language Medium

Choose the language medium you want to attempt this online test in:

বাংলা মাধ্যম (Bengali Medium) WBBSE Official
পশ্চিমবঙ্গ উচ্চমাধ্যমিক শিক্ষা সংসদ (WBCHSE) পাঠ্যক্রম অনুযায়ী সম্পূর্ণ বাংলা মাধ্যমে পরীক্ষা দিন।
English Medium
Displays questions, options, and explanations in English medium.
हिन्दी माध्यम (Hindi Medium)
प्रश्नों और विकल्पों को हिन्दी माध्यम में प्रदर्शित करेगा।
English + বাংলা (Bilingual Bengali)
Displays questions and options in English & Bengali side-by-side.
English + हिन्दी (Bilingual Hindi)
Displays questions and options in English & Hindi side-by-side.