Insights Static Quiz -397, 2019
Environment
INSIGHTS STATIC QUIZ 2019
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Question 1 of 5
1. Question
Which of the following are the key elements that lead to variation in the physical and chemical conditions of different habitats?
- Temperature
- Pathogens
- Soil
- Predators
- Competitors
- Light
Select the correct answer code:
Correct
Solution: d)
What are the key elements that lead to so much variation in the physical and chemical conditions of different habitats? The most important ones are temperature, water, light and soil. We must remember that the physico-chemical (abiotic) components alone do not characterise the habitat of an organism completely; the habitat includes biotic components also – pathogens, parasites, predators and competitors – of the organism with which they interact constantly.
Incorrect
Solution: d)
What are the key elements that lead to so much variation in the physical and chemical conditions of different habitats? The most important ones are temperature, water, light and soil. We must remember that the physico-chemical (abiotic) components alone do not characterise the habitat of an organism completely; the habitat includes biotic components also – pathogens, parasites, predators and competitors – of the organism with which they interact constantly.
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Question 2 of 5
2. Question
Consider the following statements.
- The average temperature on land decreases progressively from the equator towards
the poles and increases from plains to the mountain tops.
- Mango trees cannot grow in temperate countries.
Which of the above statements is/are incorrect?
Correct
Solution: a)
The average temperature on land varies seasonally, decreases progressively from the equator towards the poles and from plains to the mountain tops. It ranges from subzero levels in polar areas and high altitudes to >500C in tropical deserts in summer.
mango trees do not and cannot grow in temperate countries like Canada and Germany, snow leopards are not found in Kerala forests and tuna fish are rarely caught beyond tropical latitudes in the ocean.
Incorrect
Solution: a)
The average temperature on land varies seasonally, decreases progressively from the equator towards the poles and from plains to the mountain tops. It ranges from subzero levels in polar areas and high altitudes to >500C in tropical deserts in summer.
mango trees do not and cannot grow in temperate countries like Canada and Germany, snow leopards are not found in Kerala forests and tuna fish are rarely caught beyond tropical latitudes in the ocean.
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Question 3 of 5
3. Question
Consider the following statements.
- Stenothermal organisms can tolerate and thrive in a wide range of temperatures.
- Freshwater animals cannot live for long in sea water because of the osmotic problems.
Which of the above statements is/are correct?
Correct
Solution: b)
A few organisms can tolerate and thrive in a wide range of temperatures (they are called eurythermal), but, a vast majority of them are restricted to a narrow range of temperatures (such organisms are called stenothermal).
Many freshwater animals cannot live for long in sea water and vice versa because of the osmotic problems, they would face.
Incorrect
Solution: b)
A few organisms can tolerate and thrive in a wide range of temperatures (they are called eurythermal), but, a vast majority of them are restricted to a narrow range of temperatures (such organisms are called stenothermal).
Many freshwater animals cannot live for long in sea water and vice versa because of the osmotic problems, they would face.
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Question 4 of 5
4. Question
Consider the following statements with reference to ocean acidification.
- It largely occurs due to the high absorption of nitrogenous based acidic compounds.
- Productivity of corals may increase due to increase in nitrogenous nutrients.
- Introduction of sea grasses can reduce the impact of acidification.
Which of the above statements is/are correct?
Correct
Solution: c)
Acidification of ocean mainly occurs due to the carbon compounds, nitrogenous compounds contribute fraction to ocean acidification.
Productivity of corals may increase due to the availability of nitrogenous compounds and sea grass has ability to control ocean acidification.
Incorrect
Solution: c)
Acidification of ocean mainly occurs due to the carbon compounds, nitrogenous compounds contribute fraction to ocean acidification.
Productivity of corals may increase due to the availability of nitrogenous compounds and sea grass has ability to control ocean acidification.
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Question 5 of 5
5. Question
Which of the following are the effects of ozone layer depletion
- Causes non-melanoma skin cancer
- Affects the physiological and developmental processes of plants
- Phytoplankton productivity is limited to the euphotic zone
- Synthetic polymers are adversely affected
Select the correct code:
Correct
Solution: d)
Ozone layer depletion increases the amount of UVB that reaches the Earth’s surface. Laboratory and epidemiological studies demonstrate that UVB causes non-melanoma skin cancer and plays a major role in malignant melanoma development.
UVB radiation affects the physiological and developmental processes of plants.
Phytoplankton form the foundation of aquatic food webs. Phytoplankton productivity is limited to the euphotic zone, the upper layer of the water column in which there is sufficient sunlight to support net productivity.
Synthetic polymers, naturally occurring biopolymers, as well as some other materials of commercial interest are adversely affected by UVB radiation.
Incorrect
Solution: d)
Ozone layer depletion increases the amount of UVB that reaches the Earth’s surface. Laboratory and epidemiological studies demonstrate that UVB causes non-melanoma skin cancer and plays a major role in malignant melanoma development.
UVB radiation affects the physiological and developmental processes of plants.
Phytoplankton form the foundation of aquatic food webs. Phytoplankton productivity is limited to the euphotic zone, the upper layer of the water column in which there is sufficient sunlight to support net productivity.
Synthetic polymers, naturally occurring biopolymers, as well as some other materials of commercial interest are adversely affected by UVB radiation.
