In this article we are providing the NCERT Solutions for CBSE Class 12 Biology chapter 15, Biodiversity and Conservation. All the solutions are explained by the subject experts.
Importance of NCERT Exemplar Class 12 Biology:
The difficulty level of these questions is quite higher than the questions usually given at the end of the chapter of NCERT book. It will help students to enhance their preparation level for CBSE board and competitive examinations.
Questions from NCERT Exemplar are frequently asked in CBSE Class 12 boards and the medical entrance examinations.
All the NCERT Exemplar questions of class 12 Biology chapter- Biodiversity and Conservation, have been solved in the most appropriate and simple way so as to help students easily understand and memorise the terms and theories involved.
Few problems along with their solutions from this chapter are given follows:
Q. Which of the following is not a cause for loss of biodiversity?
(a) Destruction of habitat
(b) Invasion by alien species
(c) Keeping animals in zoological parks
(d) Over-exploitation of natural resources
Ans. (c) Keeping animals in zoological parks
Keeping animals in zoological parks helps in conservation of biodiversity. It gives a natural and safe environment to the protected animals.
Q. What characteristics make a community stable?
Ans. The characteristics that make a community stable are
(i) Less variation in productivity from year to year.
(ii) Resistance or resilience to occasional disturbances (natural or man-made)
(iii) Resistance to invasions by alien species.
Q. Define the terms (i) Bioprospecting (ii) Endemism
Ans. (i) Bioprospecting is a term that describes the process of discovery and
commercialisation of new products based on biological resources.
(ii) Endemism is the condition under which some species are restricted to a particular region only.
Q. Discuss one example, based on your day-to-day observations, showing how loss of one species may lead to the extinction of another.
Ans. Co-extinction is the extinction of two mutually related or interested species for instance extinction of a host fish leads to the extinction of all those parasites exclusively found on it. Another example is plant pollinator mutualism, where extinction of one leads to the extinction of other.
Insect, aphids are polyphagous (feed on more than one plant species) or monophagous (feed on a particular species of plant). Monophagous insects may become extinct, if the plant species upon which they feed becomes extinct.
Find below the links to download Class 12 Biology NCERT Exemplar Solutions for chapter 10 - Biodiversity and Conservation:
Link to Download PDF
Multiple Choice Questions
Very Short answer type questions
Short answer type questions
Long answer types questions
Class 12 Biology NCERT Exemplar Problems:
NCERT Exemplar problems are a very good resource for preparing the critical questions like Higher Order Thinking Skill (HOTS) questions. Every year, many questions from the NCERT Exemplar are directly asked in the board exams. Also, these are the kind of questions asked in the various competitive exams and Olympiad level tests. So, it’s very important for students to practice the NCERT exemplar problems to prepare well for the boards and the competitive exams.
Here, we are providing the NCERT Exemplar Problems for Class 12 Biology chapter - Biodiversity and Conservation, in the PDF form which students may download and solve them to analyse their preparedness for the exams.
Main topics discussed in Class 12 Biology, Chapter 15- Biodiversity and Conservation, are:
- Biodiversity Conservation.
Download the complete NCERT Exemplar book from the following link:
Note: Once you are done with all the NCERT Exemplar problems, refer the solutions given above in this article to check the correctness of your own solutions and know the right way to get the perfect answers.