Human activities in the recent past have caused an increased concentration of carbon dioxide in the atmosphere, but a lot of it does not remain in the lower atmosphere because of
1. It escapes into the outer stratosphere.
2. The photosynthesis by phytoplankton in the oceans.
3. The trapping of air in the polar ice caps.
Which of the statements given above is/are correct?
The question asks to identify the correct reasons why a significant portion of increased atmospheric carbon dioxide does not remain in the lower atmosphere. We need to evaluate each given statement based on scientific understanding of the carbon cycle and atmospheric processes.
B) 2 only. Statement 2 accurately describes a major natural carbon sink that removes carbon dioxide from the atmosphere. Phytoplankton photosynthesis plays a crucial role in the global carbon cycle, absorbing vast amounts of CO\(_2\).
In the context of ecosystem productivity, marine upwelling zones are important as they increase marine productivity by bringing the
1. Decomposer microorganisms to the surface.
2. Nutrients to the surface.
3. Bottom-dwelling organisms to the surface.
Which of the statements given above is/are correct?
The question asks about the importance of marine upwelling zones in increasing marine productivity. We need to evaluate each statement to determine its accuracy regarding the mechanisms of upwelling.
Based on this analysis, only statement 2 correctly describes how marine upwelling zones increase marine productivity.
Correct Option: B) 2 only
The question asks why tropical rainforests do not regenerate quickly after removal compared to tropical deciduous forests. This difference is primarily due to the distinct soil characteristics and nutrient cycling mechanisms in these two forest types.
A) The soil of rain forest is deficient in nutrients. This is the primary reason. Tropical rainforest soils are typically old, highly weathered, and poor in nutrients due to rapid leaching by heavy rainfall. Most of the nutrients are stored in the vegetation itself. When the vegetation is removed, the nutrient source is lost, and the soil quickly becomes infertile, making regeneration very slow.
The question asks for the most appropriate reason for the high species diversity in the Himalayan range. We need to evaluate each option based on ecological principles and geographical facts about the Himalayas.
B) It is a confluence of different bio-geographical zones. The Himalayas act as a biological bridge and barrier, where species from the Palearctic realm (north) and the Indomalayan realm (south) meet and intermingle. This unique geographical position, combined with extreme altitudinal variations, creates a wide array of microclimates and habitats, leading to a rich mosaic of flora and fauna. This makes it one of the world's major biodiversity hotspots.
With reference to India, consider the following Central Acts.
1. Import and Export (Control) Act,1947.
2. Miniing and mineral development (Regulation) Act,1957.
3. Customs Act,1962.
4. Indian Forest Act,1927. Which of the above Acts have relevance to/bearing on biodiversity conservation in the country?
1 and 3 only
2,3 and 4
1,2,3 and 4
None of the above acts.
The question asks to identify which of the given Central Acts have relevance to biodiversity conservation in India. We need to analyze each act individually to determine its connection to biodiversity.
C) 1,2,3 and 4
All the listed Acts—the Import and Export (Control) Act, 1947; the Mining and Mineral Development (Regulation) Act, 1957; the Customs Act, 1962; and the Indian Forest Act, 1927—have direct or indirect relevance to biodiversity conservation in India by regulating trade, mitigating environmental damage from industries, and protecting natural habitats.
The question asks to identify the theory Karl Marx used to explain class struggle. This requires knowledge of Marxian philosophy and its core concepts.
Correct Option: D) Dialectical materialism is the theory Karl Marx used to explain the process of class struggle. It posits that historical change is driven by material conditions and the conflict between opposing social classes.
The question asks why the Ionosphere facilitates radio communication. We need to evaluate two given statements regarding the properties of the Ionosphere and radio waves.
Correct Option: D) Neither 1 nor 2
The question asks to identify a key difference between Foreign Direct Investment (FDI) and Foreign Institutional Investor (FII). We need to understand the nature, objectives, and impact of each type of investment to determine the most accurate distinguishing statement.
B) FII helps in increasing capital availability in general, while FDI only targets specific sectors. This statement correctly highlights that FIIs invest broadly in financial markets, increasing overall liquidity and capital availability for various companies. FDI, by contrast, is typically directed towards specific industries, projects, or companies with the aim of long-term involvement and control.
The question asks about the primary objective behind the development of Bt-brinjal, a genetically engineered form of brinjal. Understanding the 'Bt' in Bt-brinjal is key to identifying its purpose.
Correct Option: A) To make it pest-resistant. This is the primary and intended objective of developing Bt-brinjal. The genetic modification introduces a gene from Bacillus thuringiensis that produces a protein toxic to specific insect pests, making the plant inherently resistant to them.
With reference to "Aam Admi Bima Yojana ".
Consider the following statements:
1. The members insured under the scheme must be the head of the family or an earning member of the family in rural landless households.
2. The member insured must be in the age group of 30 to 65 years.
3. There is a provision for a free scholarship for up to two children of the insured who are studying between classes 9 and 12.
Which of the statements given above is/are correct?
The question asks to identify the correct statements regarding the Aam Admi Bima Yojana (AABY). We need to evaluate each statement based on the known provisions of the scheme.
C) 1 and 3 only — Statements 1 and 3 are correct as per the provisions of the Aam Admi Bima Yojana. Statement 2 is incorrect because the age group for the insured member was 18 to 59 years, not 30 to 65 years.