India has only 2.4% of the world's land area but its share of the global species diversity is:
Show Hint
- 8.1%
- 12.9%
- 7.3%
- 5.1%
The Correct Option is A
Solution and Explanation
Top Questions on Biodiversity and Conservation
- Student to attempt either option-(A) or (B): (A)
- [(i)] How does alien species invasion cause a decline in biodiversity? Explain.
How have the following contributed to biodiversity loss?- I. Nile Perch
- II. Lantana and Eichhornia
- III. Clarias gariepinus
- [(ii)] Why have certain regions been declared as biodiversity hotspots by environmentalists of the world? Name any two such regions in India.
(B)- [(i)] Write an equation for Verhulst-Pearl Logistic Growth Curve where:
N = Population density at time ‘t’
r = Intrinsic rate of natural increase - [(ii)] Draw a graph for a population whose population density has reached carrying capacity.
- [(iii)] Draw a growth curve where resources are non-limiting to growth of population.
- [(iv)] Which growth curve is considered more realistic and why? Explain.
- CBSE CLASS XII - 2025
- Biology
- Biodiversity and Conservation
- [(i)] How does alien species invasion cause a decline in biodiversity? Explain.
- India has only 2.4% of the world's land area but its share of the global species diversity is:
- CBSE CLASS XII - 2025
- Biology
- Biodiversity and Conservation
Answer the following questions:
- Explain how the process of RNA interference technology is used effectively to prevent infestation of the roots of tobacco plant by the nematode Meloidogyne incognita.
OR - Explain how more than a billion copies of a fragment of DNA are formed using the technique of PCR.
- CBSE CLASS XII - 2025
- Biology
- Biodiversity and Conservation
- Explain how the process of RNA interference technology is used effectively to prevent infestation of the roots of tobacco plant by the nematode Meloidogyne incognita.
- Answer the following questions:
-
- [(i)] Describe the Species-Area relationship as observed by Alexander von Humboldt, for a wide variety of taxa in nature.
- [(ii)] Draw the graph showing Species-Area relationship for \( S = CA^Z \). What is the significance of ‘\( Z \)’ in Species-Area relationship?
-
- [(i)] Describe the logistic population growth curve with the help of a suitable graphical representation.
- [(ii)] Write the equation of Verhulst-Pearl logistic growth curve and explain what ‘\( K \)’ and ‘\( r \)’ suggest in the given equation.
- CBSE CLASS XII - 2025
- Biology
- Biodiversity and Conservation
-
- (a) Alien species are highly invasive and are a threat to indigenous species. Substantiate this statement with the help of any two examples.
(b) State any two criteria for determining biodiversity hotspots.- CBSE CLASS XII - 2025
- Biology
- Biodiversity and Conservation
Questions Asked in CBSE CLASS XII exam
Inspired by the success of Chandrayaan-3, the Chief Scientist at ‘Space Rover’ a private research group, decided to send some innovative ideas regarding the mission to the Chief Scientist of Chandrayaan-3. The Chief Scientist at ‘Space Rover’ formed four groups for the same. As it was an intellectual activity of thinking rather than doing, these four groups started interacting with each other and friendships developed. On the basis of their interaction and friendship, some members from each group formed ‘Entertainment Through Reading’ group which showed conformity in terms of their interest. ‘Entertainment Through Reading’ group had no written rules, was unstable in form and scope and had no fixed lines of communication. The members of this group enhanced the morale of each other, enjoyed drinking coffee together, read books, served different issues of their work areas and provided support to each other. Ultimately this group developed some innovative ideas which were sent by ‘Space Rover’ to the Chief Scientist of Chandrayaan-3. Though this group was formed for recreation but it contributed towards fulfillment of organisational objectives.
(a) Identify the function of management. Quoting the lines from the above para, explain the steps of the process of the function of management discussed.
(b) Also explain any two points of importance of the function of management identified in (a).- CBSE CLASS XII - 2025
- Controlling
(a) Identify and explain the function of management discussed in the above para.
(b) Explain any four points of importance of the function identified in (a).- CBSE CLASS XII - 2025
- Organizing
Explain the following factors affecting the working capital requirements of a business:
(i) Credit allowed
(ii) Production cycle
(iii) Availability of raw material- CBSE CLASS XII - 2025
- Financial Management and Financial Market
Explain the following points of significance of principles of management:
(i) Providing managers with useful insights into reality
(ii) Meeting changing environment requirements
(iii) Scientific decisions- CBSE CLASS XII - 2025
- Principles of Management
- Explain the following functions of marketing:
(i) Gathering and Analysing Market Information
(ii) Marketing Planning- CBSE CLASS XII - 2025
- Marketing Management