CBSE Class 12 Biology HOTs Biodiversity

Refer to CBSE Class 12 Biology HOTs Biodiversity. We have provided exhaustive High Order Thinking Skills (HOTS) questions and answers for Class 12 Biology Biodiversity. Designed for the 2026-27 exam session, these expert-curated analytical questions help students master important concepts and stay aligned with the latest CBSE, NCERT, and KVS curriculum.

Biodiversity Class 12 Biology HOTS with Solutions

Check out these Class 12 Biology HOTS Questions to test your advanced knowledge of Biology. The detailed answers below will help you practice smarter and build high-level accuracy for your Class 12 tests.

Get Biodiversity HOTS PDF for Class 12 Biology

 BIODIVERSITY

1 marks

Q.1) a) India has more than 50000 different strains of rice and 1000 varieties of mangoes.
 
        b) Western Ghats have a greater Amphibian diversity than the Eastern Ghats. What do you infer from the above two statements? 

Ans.1)  a) Genetic diversity       

            b) Species diversity

2 marks

Q.1

CBSE_Class_12_Biology_biodiversity_1 

Identify a,b,c and d in the above pie diagram showing global biodiversity of plants. 

Ans.1)  a) Angiosperms

            b) Algae 

            c) Fungi 

            d) Mosses

Q.2) Columbia located near the equator has nearly 1400 species of birds while new york at 41˚ N has 105 species and Greenland at 71˚ N has only 56 species.  Comment. 2

Ans.2) Latitudinal gradients in biodiversity. Biodiversity decreases as latitude increases .

           Biodiversity decreases as one move from tropics to equator.]

Q.3) Would the extinction of one insect pollinator affect the ecosystem? Explain 2 

Ans.3) Yes,  

It may lead to co-extinction of species  

In the case of a co-evolved plant-Pollinator Mutualism where extinction of one invariably Leads to the extinction of the other

Q.4) The species diversity of plants is much less than that of animals. What could be the reason for this and figure out how animals achieved greater diversifications? 2
 
Ans 4) Animals have greater mobility  Animals migrate to different environmental conditions and undergo adaptation
 
Q.5) Seeds of different genetic strains are kept for long periods in seed banks. Explain the conservative strategy involved in this process. 2
 
Ans.5) Ex-situ conservation They are preserved in viable and fertile condition for long periods using cryopresrvation techniques.
 
Q.6) Amazon forests are regarded are "Lungs of the Planet". Why? 2
 
Ans.6) Amazon forests have the greatest biodiversity in the world and harbour a large number of plant species which release large amount of oxygen into the atmosphere.
 
Q.7) National parks come under 'in situ' conservation while Zoological parks under 'exsitu' conservation. comment. 2

Ans.7) National parks- in situ- It is the practice of protecting the endangered species in their natural habitats either by protecting or by defending the species from predators.

Zoological parks- ex situ- the threatened species are taken out from their natural habitat and placed in special setting and given protection and special care.

Q.8) There are 34 biodiversity hot spots in the world. What are the criteria of selection of such hot spots? 2

Ans .8)   i) High level of species richness 

             ii) High degree of endemism

Q.9) Lantana & Eichornia are examples of two weeds. How do they affect the ecosystem? 2

Ans.9.These are examples of Alien species invasions. They threaten the indigenous species & lead to their extinction.

3 marks
 
Q.1) Biologists are not sure about how many prokaryotic species there might be. Give reasons.
 
Ans.1) i)The conventional taxonomic methods are not sufficient for identifying these microbial species
 
          ii)Many of the species cannot be cultured under laboratory conditions.
 
         iii) Biochemical and molecular biology techniques would put their diversity into millions.
 
Q.2) In an experiment, the slope of regression (z) is 0.2 and in another experiment the value obtained is 1.2. Explain the two situations in respect of species area relationships.

Ans.2) 0.2 is obtained in studies regardless of the taxonomic group or the region 1.2 is obtained if species area relationship is analysed among very large areas like the entire continents.

Q.3) Would Western Ghats ecosystems be less functional if one of its tree frog species is lost forever? Substantiate your answer in the light of hypothesis proposed by Paul Ehrlich.

Ans.3) According to the hypothesis proposed by Paul Ehrlich the "vivet popper hypothesis" each species is essential in the balance of nature. If one is lost that much imbalance is caused in the ecosystem.

Free study material for Biology

Download Class 12 Biology Biodiversity HOTS Practice Questions

Class 12 Biology Chapter Biodiversity Advanced Problem Sets

Master core concepts in Biodiversity with these targeted Higher Order Thinking Skills (HOTS) problems. Built for Class 12 Biology students following the CBSE curriculum, these exercises challenge analytical thinking and improve problem-solving speed.

Step-by-Step Answers for Biodiversity

Each question in this set is mapped directly to the official NCERT book for Class 12. Review the detailed answer keys provided below each problem to verify your solution steps and correct mistakes early.

Complete Your Chapter Revision

Looking for more practice? Explore our complete library of Class 12 Biology worksheets, chapter notes, and online mock tests. Everything is provided free of charge to support your academic goals.

FAQs

Where can I download the latest PDF for CBSE Class 12 Biology HOTs Biodiversity?

You can download the teacher-verified PDF for CBSE Class 12 Biology HOTs Biodiversity from StudiesToday.com. These questions have been prepared for Class 12 Biology to help students learn high-level application and analytical skills required for the 2026-27 exams.

Why are HOTS questions important for the 2026 CBSE exam pattern?

In the 2026 pattern, 50% of the marks are for competency-based questions. Our CBSE Class 12 Biology HOTs Biodiversity are to apply basic theory to real-world to help Class 12 students to solve case studies and assertion-reasoning questions in Biology.

How do CBSE Class 12 Biology HOTs Biodiversity differ from regular textbook questions?

Unlike direct questions that test memory, CBSE Class 12 Biology HOTs Biodiversity require out-of-the-box thinking as Class 12 Biology HOTS questions focus on understanding data and identifying logical errors.

What is the best way to solve Biology HOTS for Class 12?

After reading all conceots in Biology, practice CBSE Class 12 Biology HOTs Biodiversity by breaking down the problem into smaller logical steps.

Are solutions provided for Class 12 Biology HOTS questions?

Yes, we provide detailed, step-by-step solutions for CBSE Class 12 Biology HOTs Biodiversity. These solutions highlight the analytical reasoning and logical steps to help students prepare as per CBSE marking scheme.