The Daily Current Affairs Quiz questions are based on various national and regional newspapers including government news sources.
The questions are framed on happenings around you to enhance your competitiveness for news based concepts and facts
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Question 1 of 5
1. Question
Q1. Which of the following best explains why there are rarely more than four trophic levels in a food chain?
Correct
Correct Answer: C
Explanation: According to the 10% law, only about 10% of the energy is transferred from one trophic level to the next. The rest is lost as heat or used in metabolic processes. As energy diminishes significantly at each level, supporting more than four or five trophic levels becomes ecologically unsustainable.
Incorrect
Correct Answer: C
Explanation: According to the 10% law, only about 10% of the energy is transferred from one trophic level to the next. The rest is lost as heat or used in metabolic processes. As energy diminishes significantly at each level, supporting more than four or five trophic levels becomes ecologically unsustainable.
Question 2 of 5
2. Question
Q2. In which of the following ecosystems is the detritus food chain the dominant pathway for energy flow?
Correct
Correct Answer: B
Explanation: In terrestrial ecosystems, especially dense forest ecosystems like tropical rainforests, a large proportion of energy flows through the detritus food chain due to the abundance of leaf litter, dead organic matter, and slower decomposition rates compared to aquatic ecosystems.
Incorrect
Correct Answer: B
Explanation: In terrestrial ecosystems, especially dense forest ecosystems like tropical rainforests, a large proportion of energy flows through the detritus food chain due to the abundance of leaf litter, dead organic matter, and slower decomposition rates compared to aquatic ecosystems.
Question 3 of 5
3. Question
Consider the following statements regarding ecological pyramids:
1. The pyramid of biomass is always upright.
2. The pyramid of energy is always upright.
3. Pyramid of numbers can be either upright or inverted depending on the ecosystem.
Which of the above statements is/are correct?
Correct
Correct Answer: B
Explanation:
Statement 1 is incorrect: The biomass pyramid can be inverted, especially in aquatic ecosystems where producers like phytoplankton have low biomass but high productivity.
Statement 2 is correct: Energy pyramid is always upright due to the unidirectional flow and loss of energy at each level.
Statement 3 is correct: Pyramid of numbers can be upright (grassland) or inverted (tree ecosystem where a single tree supports many herbivores).
Incorrect
Correct Answer: B
Explanation:
Statement 1 is incorrect: The biomass pyramid can be inverted, especially in aquatic ecosystems where producers like phytoplankton have low biomass but high productivity.
Statement 2 is correct: Energy pyramid is always upright due to the unidirectional flow and loss of energy at each level.
Statement 3 is correct: Pyramid of numbers can be upright (grassland) or inverted (tree ecosystem where a single tree supports many herbivores).
Question 4 of 5
4. Question
Which of the following pollutants is most likely to undergo biomagnification in an aquatic food chain?
Correct
Correct Answer: B
Explanation: DDT is a fat-soluble, persistent organic pollutant with a long biological half-life. It accumulates in fatty tissues and increases in concentration as it moves up the food chain, a phenomenon known as biomagnification. Water-soluble substances are usually excreted and do not magnify.
Incorrect
Correct Answer: B
Explanation: DDT is a fat-soluble, persistent organic pollutant with a long biological half-life. It accumulates in fatty tissues and increases in concentration as it moves up the food chain, a phenomenon known as biomagnification. Water-soluble substances are usually excreted and do not magnify.
Question 5 of 5
5. Question
With reference to phytoplankton and zooplankton in aquatic ecosystems, consider the following statements:
1. Phytoplankton contribute significantly to global oxygen production through photosynthesis.
2. Zooplankton are primary producers in aquatic ecosystems.
3. The rapid turnover rate of phytoplankton results in an inverted biomass pyramid in aquatic systems.
Which of the statements given above is/are correct?
Correct
Correct Answer: C
Explanation:
Statement 1 is correct: Phytoplankton are autotrophs and play a major role in oxygen production and carbon fixation.
Statement 2 is incorrect: Zooplankton are heterotrophs, not producers.
Statement 3 is correct: In aquatic ecosystems, phytoplankton have a high turnover rate, leading to an inverted biomass pyramid where consumer biomass exceeds producer biomass.
Incorrect
Correct Answer: C
Explanation:
Statement 1 is correct: Phytoplankton are autotrophs and play a major role in oxygen production and carbon fixation.
Statement 2 is incorrect: Zooplankton are heterotrophs, not producers.
Statement 3 is correct: In aquatic ecosystems, phytoplankton have a high turnover rate, leading to an inverted biomass pyramid where consumer biomass exceeds producer biomass.
