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100 questions in this collection · Page 7 of 10
Question 61 of 100
📘 CLASS XII
Biodiversity And Conservation
Consider the following statements regarding the basic setups used for ex situ conservation:
I. Zoological parks, botanical gardens, and wildlife safari parks serve the purpose of ex situ conservation. II. In these setups, threatened animals and plants are taken out from their natural habitat and placed in special settings. III. National parks and biosphere reserves are also considered ex situ setups because they have strict administrative boundaries.
Which of the statements given above are correct?
Zoological parks, botanical gardens, and wildlife safari parks are classic examples of ex situ (off-site) conservation. Statement III is incorrect because biosphere reserves and national parks are in situ (on-site) conservation methods.
Question 62 of 100
📘 CLASS XII
Biodiversity And Conservation
Read the following statements regarding the survival of species in captivity:
I. There are many animals that have become extinct in the wild but continue to be maintained in zoological parks. II. Maintaining extinct-in-the-wild species in zoological parks is a form of in situ conservation since they are kept in their native country. III. Zoological parks can prevent the absolute extinction of a species even after its natural habitat is completely destroyed.
Which of the statements given above are correct?
Statement I is correct. Statement III is also correct because ex situ facilities can prevent total extinction of a species. Statement II is incorrect because zoological parks are always an ex situ conservation method.
Question 63 of 100
📘 CLASS XII
Biodiversity And Conservation
With reference to advanced techniques in ex situ conservation, evaluate the following statements:
I. Gametes of threatened species can be preserved in viable and fertile conditions for long periods using cryopreservation techniques. II. Cryopreservation is highly ineffective for animal gametes and is only restricted to bryophyte spores. III. Preserving genetic material at ultra-low temperatures represents a modern advancement in off-site conservation.
Which of the statements given above are correct?
Statements I and III are correct. Cryopreservation allows long-term preservation of viable gametes and other genetic material. Statement II is incorrect because cryopreservation is widely used for threatened animal species and is not limited to bryophytes.
Question 64 of 100
📘 CLASS XII
Biodiversity And Conservation
Study the following statements regarding modern biological methods integrated into ex situ conservation:
I. Eggs of threatened animal species can be fertilized in vitro. II. Threatened plant species can be propagated using tissue culture methods. III. Both in vitro fertilization and tissue culture are traditional, in situ methods that do not require specialized laboratory settings.
Which of the options represents the correct statements?
Statements I and II are correct. In vitro fertilization and tissue culture are advanced laboratory-based ex situ conservation techniques. Statement III is incorrect because both require specialized laboratory facilities.
Question 65 of 100
📘 CLASS XII
Biodiversity And Conservation
Consider the following statements about seed banks as a conservation tool:
I. Seeds of different genetic strains of commercially important plants can be kept for long periods in seed banks. II. Seed banks can only store wild weed species and are prohibited from storing agricultural crops. III. Storing genetic strains of plants in seed banks represents an important ex situ conservation strategy.
Which of the statements given above are correct?
Statements I and III are correct. Seed banks are important ex situ conservation tools for preserving crop varieties and wild relatives. Statement II is incorrect because agricultural crops are major components of seed banks.
Question 66 of 100
📘 CLASS XII
Biodiversity And Conservation
Read the following statements regarding the historic "Earth Summit":
I. The Convention on Biological Diversity is popularly known as the Earth Summit. II. It was held in Johannesburg, South Africa, in 1992. III. It was held in Rio de Janeiro, Brazil, in 1992.
Which of the statements given above are correct?
Statement I is correct. Statement III is also correct because the Earth Summit was held at Rio de Janeiro, Brazil, in 1992. Statement II is incorrect because Johannesburg hosted the World Summit on Sustainable Development in 2002.
Question 67 of 100
📘 CLASS XII
Biodiversity And Conservation
Consider the core mandates of the Earth Summit (1992):
I. It called upon all nations to take appropriate measures for the conservation of biodiversity. II. It called for the sustainable utilization of the benefits of biodiversity. III. It legally mandated all tropical countries to hand over their biological resources to temperate nations for cataloguing.
Which of the statements given above are correct?
Statements I and II are correct. The Earth Summit emphasized biodiversity conservation and sustainable utilization. Statement III is incorrect because the Convention respects national sovereignty over biological resources.
Question 68 of 100
📘 CLASS XII
Biodiversity And Conservation
Study the following statements regarding the World Summit on Sustainable Development:
I. It was held in Johannesburg, South Africa, in 2002 as a follow-up to the Earth Summit. II. During this summit, 190 countries pledged their commitment to biodiversity conservation. III. It was held in Rio de Janeiro, Brazil, in 2002.
Which of the options represents the correct statements?
Statements I and II are correct. The World Summit on Sustainable Development was held in Johannesburg in 2002, where 190 countries reaffirmed their commitment. Statement III is incorrect because Rio hosted the Earth Summit in 1992.
Question 69 of 100
📘 CLASS XII
Biodiversity And Conservation
Consider the exact pledge and targets set during the 2002 World Summit on Sustainable Development:
I. The countries pledged to achieve a significant reduction in the current rate of biodiversity loss. II. This reduction target was set to be achieved by the year 2010. III. The target rate of reduction was focused strictly on the global level, excluding regional and local levels to simplify metrics.
Which of the statements given above are correct?
Statements I and II are correct. The 190 participating countries pledged to significantly reduce the current rate of biodiversity loss by 2010. Statement III is incorrect because the commitment specifically addressed biodiversity loss at the global, regional, and local levels.
Question 70 of 100
📘 CLASS XII
Biodiversity And Conservation
Read the following statements summarizing global species proportions:
I. More than 70 per cent of all recorded species are animals. II. Plants (including algae, fungi, bryophytes, gymnosperms, and angiosperms) comprise no more than 22 per cent of the global total. III. Fungi comprise exactly 70 per cent of the plant kingdom.
Which of the statements given above are correct?
Statements I and II are correct. Animals account for over 70% of all recorded species, while plants (including algae, fungi, bryophytes, gymnosperms, and angiosperms) account for no more than 22%. Statement III is incorrect because no such proportion exists for fungi.