Insights Static Quiz -318, 2019
Environment
INSIGHTS STATIC QUIZ 2019
Quiz-summary
0 of 5 questions completed
Questions:
- 1
- 2
- 3
- 4
- 5
Information
You have already completed the quiz before. Hence you can not start it again.
Quiz is loading...
You must sign in or sign up to start the quiz.
You have to finish following quiz, to start this quiz:
Results
0 of 5 questions answered correctly
Your time:
Time has elapsed
You have reached 0 of 0 points, (0)
Categories
- Not categorized 0%
- 1
- 2
- 3
- 4
- 5
- Answered
- Review
-
Question 1 of 5
1. Question
What would happen if phytoplankton of an ocean is completely destroyed for some reason?
- The ocean as a carbon sink would be adversely affected.
- The density of ocean water would drastically increase.
- The food chains in the ocean would be adversely affected.
Which of the above statements is/are correct?
Correct
Solution: c)
Phytoplanktons are food factories of the ocean, it fixes atmospheric carbon dioxide in large quantities (Carbon Sink) and produce food. So, if phytoplanktons are removed completely it leads to catastrophic failure of ocean ecosystem. It doesn’t influence the density of ocean water.
Incorrect
Solution: c)
Phytoplanktons are food factories of the ocean, it fixes atmospheric carbon dioxide in large quantities (Carbon Sink) and produce food. So, if phytoplanktons are removed completely it leads to catastrophic failure of ocean ecosystem. It doesn’t influence the density of ocean water.
-
Question 2 of 5
2. Question
Consider the following statements regarding food chain in ecosystem.
- In an aquatic ecosystem, larger fraction of energy flow through detritus food chain than grazing food chain.
- In a terrestrial ecosystem, more energy flows through grazing food chain than detritus food chain.
- Around 90% of energy is lost in energy flow across different trophic levels.
Which of the above statements is/are incorrect?
Correct
Solution: c)
In an aquatic ecosystem, grazing food chain is the major conduit for energy flow. As against this, in a terrestrial ecosystem, a much larger fraction of energy flows through the detritus food chain than through the grazing food chain.
When energy is passed in an ecosystem from one trophic level to the next, only ten percent of the energy will be passed. Around 90% of energy will be lost.
Incorrect
Solution: c)
In an aquatic ecosystem, grazing food chain is the major conduit for energy flow. As against this, in a terrestrial ecosystem, a much larger fraction of energy flows through the detritus food chain than through the grazing food chain.
When energy is passed in an ecosystem from one trophic level to the next, only ten percent of the energy will be passed. Around 90% of energy will be lost.
-
Question 3 of 5
3. Question
The relationship between Cattle Egrets and livestock is an example of
Correct
Solution: a)
Commensalism is a relationship between two organisms where one receives a benefit or benefits from the other and the other is not affected by it. In other words, one is benefited and the other is neither benefited nor harmed. Other ex: Anemonefishes or clownfishes – These live amid the tentacles of the anemones which protects them from predators. Predators are poisoned by the nematocysts of the anemones.
Incorrect
Solution: a)
Commensalism is a relationship between two organisms where one receives a benefit or benefits from the other and the other is not affected by it. In other words, one is benefited and the other is neither benefited nor harmed. Other ex: Anemonefishes or clownfishes – These live amid the tentacles of the anemones which protects them from predators. Predators are poisoned by the nematocysts of the anemones.
-
Question 4 of 5
4. Question
In which of the following regions in India coral reefs are found?
- Rann of Kutch
- Gulf of Mannar
- Sundarbans
- Lakshadweep
Select the correct answer using the code given below
Correct
Solution: d)
Corals are not located in Sunderban region due to the high influx of freshwater. Coral needs sea water of optimum salinity, which is diluted by the influx of fresh water from Ganga and Brahmaputra in Sunderbans.
Incorrect
Solution: d)
Corals are not located in Sunderban region due to the high influx of freshwater. Coral needs sea water of optimum salinity, which is diluted by the influx of fresh water from Ganga and Brahmaputra in Sunderbans.
-
Question 5 of 5
5. Question
The phenomenon of increasing concentration of a substance, such as a toxic chemical, in the tissues of tolerant organisms at successively higher levels in a food chain is known as:
Correct
Solution: c)
Biomagnification, also known as bioamplification or biological magnification, is the increasing concentration of a substance, such as a toxic chemical, in the tissues of tolerant organisms at successively higher levels in a food chain.
Incorrect
Solution: c)
Biomagnification, also known as bioamplification or biological magnification, is the increasing concentration of a substance, such as a toxic chemical, in the tissues of tolerant organisms at successively higher levels in a food chain.
