CBSE Class 12 Biology - Biodiversity and Conservation

Scroll down for PDF

CBSE Basic Concepts and Assignment for Class XII Biology -Biodiversity and Conservation . Based on CBSE and CCE guidelines. The students should read these basic concepts to gain perfection which will help him to get more marks in CBSE examination.



1. Habitat loss and fragmentation has caused severe damage to a particular type of ecosystem. Name it.

2. What trend is observed in respect of species diversity when we move from equator to poles?

3. Which region is considered as the one with highest biodiversity on earth? What is the name given to such region.forests?

4. Ecologists have discovered that value of lies in range of 0.1 to 0.2 regardless of taxonomic group or region. When will the slope of line steeper in species area relationship?

5. Define cryopreservation. Why is it useful in conserving biodiversity?

6. What is the reason for genetic variation shown by medicinal plant Rauwolfia vomitoria?

7. How many species of plants and animals have been described by IUCN in 2004? What is global species diversity according to Robert May?

8. Explain co-extinction with a suitable example.



1. Tropical Rain Forest.

2. In general, species diversity decreases as we move away from the equator towards poles.

3. Amazonian rain forests. They are also called the ‘Lungs of the planet’.

4. Slope of line is much steeper if one analyses the species¡Varea relationship among very large areas like entire continents.

5. Preserving a material in liquid nitrogen at – 196°C. It can be done to preserve threatened species in viable and fertile condition for long period.

6. Genetic variation might be in terms of potency and concentration of the active chemical reserpine produced by plant.


Please refer to attached file for CBSE Class 12 Biology - Biodiversity and Conservation


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

CBSE schools to have sports period daily for classes 1 to 12

All work and no play makes a child dull. Nowadays students have a very hectic schedule so that they cannot take out time to play games and gently start ignoring sports. Therefore, it is the responsibility of schools to include physical education in the curriculum so...

CBSE Board Exams Changes to be implemented in exam pattern

CBSE Board Exams Class 10 & 12 2020: Changes to be implemented in exam pattern Are you appearing for the CBSE Class 10 and 12 Board Exams 2020? If yes, then you have to check out what CBSE has brought the major changes for the CBSE class 10 and 12 board exams 2020...

Class 10 and 12 exam 2020 application process for private candidates

CBSE 10th, 12th exam 2020 application process for private candidates begins to apply by 30th Sept at CBSE Board Exam 2020 application begins: The Central Board of Secondary Education (CBSE) has officially started the online application process for the...

CBSE Board Practical Exam 2020

CBSE Board Practical Exam 2020: Important changes in date sheet, internal/external examiners and more Are you doing preparations for class 10 and 12 CBSE board exams? If yes, then you have to see what major changes CBSE has brought in the CBSE date sheet for class 10...

5 Signs Why Your Child Needs a Tutor

Is your child struggling at school? Are they leaving assignments incomplete? When it comes to education every student is different. Some children do well with the help of the teacher at school and an active parent while others need extra help. When children have...

Sample Papers for Class 10 Boards 2020

CBSE has recently released the Class 10 Sample Papers for Board exams which are to be held in March 2020. The sample papers have been for class 10 for all subjects along with the suggested marking scheme. CBSE releases these suggested papers every year so that the...

Studies Today