CBSE Class 12 Biology Worksheet - Ecology

Scroll down for PDF

CBSE Class 12 Biology Worksheet - Ecology. CBSE issues sample papers every year for students for class 12 board exams. Students should solve the CBSE issued sample papers to understand the pattern of the question paper which will come in class 12 board exams this year. The sample papers have been provided with marking scheme. It’s always recommended to practice as many CBSE sample papers as possible before the board examinations. Sample papers should be always practiced in examination condition at home or school and the student should show the answers to teachers for checking or compare with the answers provided. Students can download the sample papers in pdf format free and score better marks in examinations. Refer to other links too for latest sample papers. 

1. In a pond there were 40 lotus plants. After a year the number increased to 56. Calculate birth rate of a lotus plant. 1

2. Why pyramid of energy can never be inverted? 1

3. Why do cattle avoid browsing on Calotropis plants? 1

4. What is Allen’s rule? 1

5. Lichen is considered a good example of obligate mutualism. Explain. 1

6. Distinguish between primary productivity and secondary productivity 2

7. Write the differences between the seral stage and the climax community during succession. 2

8. What measures can be adopted in surroundings to decrease the noise pollution? 2

9. What are the advantages of ‘Ecosan’ ? 2

10. Giving two reasons explain why there is more species biodiversity in tropical latitudes than in temperate ones. 2

11. Mention the major cause of air pollution in metro cities. Write any three ways by which it can be reduced. 2

12. Name the four functional aspects of an ecosystem.

13. What steps have been taken by the Government to reduce pollution in Delhi?

14. What is the condition to dispose off the radioactive waste? 3

15. Describe the process of succession on a bare rock. 3

16. What function do detritivores play in an ecosystem? Explain the significance of humification and mineralization in a decomposition cycle.

Please click the link below to download full pdf file for CBSE Class 12 Biology Worksheet - Ecology.

Tags: 


Click on the text For more study material for Biology please click here - Biology

Latest NCERT & CBSE News

Read the latest news and announcements from NCERT and CBSE below. Important updates relating to your studies which will help you to keep yourself updated with latest happenings in school level education. Keep yourself updated with all latest news and also read articles from teachers which will help you to improve your studies, increase motivation level and promote faster learning

How to crack a competitive examination

“How I crack a competitive examination” is a frequently asked question by today’s students. Cracking a competitive exam is a challenging task. Attaining a huge amount of study and solving several complex problems in a limited amount of time is a huge task. Competitive...

NCERT NTSE Admit Card 2020 released - know more

Introduction: NTSE 2020 National Talent search examination is conducted by NCERT to take out the students who excel in science. It is organized to measure and let the students with talent outshine in their coming future. This talent search exam is taken in 2 stages....

CBSE examination board hike the fee for class 10th and 12th

The CBSE (Central Board Secondary Education) increased the examination fees for classes 10 and 12 of the 2020 boards, with no profit no loss principle, from Rs. 750 to Rs 1500, for all categories of students, including SC/ST candidates for all schools throughout India...

CBSE DATE SHEET 2020

Central Board of Secondary Education, CBSE is to conduct the 10th and 12th Board Examination 2020 from February 15, 2020. Due to University Admissions, CBSE has shifted Board Exams dates from 1 March to February 15 from 2019. This year too CBSE would be making changes...

CBSE Board Secretary says Class 10 and 12 CBSE Exam Pattern to be modified

The Central Board of Secondary Education is expected to introduce a few changes to the exam pattern for class 10 and board exams by 2023. Anurag Tripathi, secretary of CBSE speaking at an Assoham School Education Summit said that although this year class 10 students...

CBSE Circular Aryabhatta Ganit Challenge

For students with a keen interest in mathematics are now provided with a better opportunity to explore their knowledge. CBSE has announced to conduct an exam for the purpose of generating interest in maths among students. It is a trial to clarify the myth that...

×
Studies Today