INSIGHTS STATIC QUIZ 2019
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Question 1 of 5
1. Question
Which of the following ecological pyramids is/are upright in pond ecosystem?
- Pyramid of number
- Pyramid of biomass
- Pyramid of energy
Select the correct answer code:
Correct
Solution: d)
Pyramid of energy and number is upright in pond ecosystem. Pyramid of biomass is inverted in an aquatic ecosystem because the biomass of fishes far exceeds the biomass of phytoplanktons.
Incorrect
Solution: d)
Pyramid of energy and number is upright in pond ecosystem. Pyramid of biomass is inverted in an aquatic ecosystem because the biomass of fishes far exceeds the biomass of phytoplanktons.
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Question 2 of 5
2. Question
Consider the following statements regarding Desertification.
- Desertification refers to the expansion of existing deserts.
- Desertification is caused primarily by human activities alone.
- United Nations Convention to Combat Desertification is the only internationally legally binding framework set up to address the problem of desertification.
Which of the above statements is/are incorrect?
Correct
Solution: b)
Desertification is the degradation of land in arid, semi-arid and dry sub-humid areas. It is caused primarily by human activities and climatic variations. Desertification does not refer to the expansion of existing deserts.
It occurs because dryland ecosystems, which cover over one third of the world‘s land area, are extremely vulnerable to overexploitation and inappropriate land use.
Established in 1994, the United Nations Convention to Combat Desertification (UNCCD) is the sole legally binding international agreement linking environment and development to sustainable land management. The Convention addresses specifically the arid, semi-arid and dry sub-humid areas, known as the drylands, where some of the most vulnerable ecosystems and peoples can be found.
Incorrect
Solution: b)
Desertification is the degradation of land in arid, semi-arid and dry sub-humid areas. It is caused primarily by human activities and climatic variations. Desertification does not refer to the expansion of existing deserts.
It occurs because dryland ecosystems, which cover over one third of the world‘s land area, are extremely vulnerable to overexploitation and inappropriate land use.
Established in 1994, the United Nations Convention to Combat Desertification (UNCCD) is the sole legally binding international agreement linking environment and development to sustainable land management. The Convention addresses specifically the arid, semi-arid and dry sub-humid areas, known as the drylands, where some of the most vulnerable ecosystems and peoples can be found.
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Question 3 of 5
3. Question
Arrange the following reasons that cause desertification in India in the ascending order.
- Wind erosion
- Water erosion
- Vegetation degradation
- Salinity
Select the correct answer code:
Correct
Solution: c)
Main reasons that cause desertification in India are:
- Water erosion (10.98 per cent)
- Wind erosion (5.55 per cent)
- Human-made/settlements (0.69 per cent)
- Vegetation degradation (8.91 per cent)
- Salinity (1.12 per cent)
- Others (2.07 per cent)
Incorrect
Solution: c)
Main reasons that cause desertification in India are:
- Water erosion (10.98 per cent)
- Wind erosion (5.55 per cent)
- Human-made/settlements (0.69 per cent)
- Vegetation degradation (8.91 per cent)
- Salinity (1.12 per cent)
- Others (2.07 per cent)
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Question 4 of 5
4. Question
A Biomarker is generally used as an indicator of
Correct
Solution: c)
A biomarker may be used to see how well the body responds to a treatment for a disease or condition. Also called molecular marker and signature molecule.
It can also be a substance whose detection indicates a particular disease state, for example, the presence of an antibody may indicate an infection. More specifically, a biomarker indicates a change in expression or state of a protein that correlates with the risk or progression of a disease, or with the susceptibility of the disease to a given treatment.
One example of a commonly used biomarker in medicine is prostate-specific antigen (PSA). This marker can be measured as a proxy of prostate size with rapid changes potentially indicating cancer.
Incorrect
Solution: c)
A biomarker may be used to see how well the body responds to a treatment for a disease or condition. Also called molecular marker and signature molecule.
It can also be a substance whose detection indicates a particular disease state, for example, the presence of an antibody may indicate an infection. More specifically, a biomarker indicates a change in expression or state of a protein that correlates with the risk or progression of a disease, or with the susceptibility of the disease to a given treatment.
One example of a commonly used biomarker in medicine is prostate-specific antigen (PSA). This marker can be measured as a proxy of prostate size with rapid changes potentially indicating cancer.
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Question 5 of 5
5. Question
Consider the following statements regarding Productivity of organisms:
- Primary Productivity is defined as the rate of formation of new organic matter by the major ‘Consumers’ of the ecosystem.
- Primary productivity depends on the plant species inhabiting a particular area, environmental factors, and availability of nutrients and photosynthetic capacity of plants.
Which of the above statements is/are correct?
Correct
Solution: b)
Primary production is defined as the amount of biomass or organic matter produced per unit area over a time period by plants during photosynthesis.
Primary productivity depends on the plant species inhabiting a particular area. It also depends on a variety of environmental factors, availability of nutrients and photosynthetic capacity of plants. Therefore, it varies in different types of ecosystems.
Incorrect
Solution: b)
Primary production is defined as the amount of biomass or organic matter produced per unit area over a time period by plants during photosynthesis.
Primary productivity depends on the plant species inhabiting a particular area. It also depends on a variety of environmental factors, availability of nutrients and photosynthetic capacity of plants. Therefore, it varies in different types of ecosystems.
