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
Which of the following statements correctly distinguishes a food web from a food chain?
Correct
Correct Answer: B
Explanation: A food web is a network of interconnected food chains in an ecosystem. It reflects the complex feeding relationships and provides alternative food sources, increasing the resilience of the ecosystem. A food chain, in contrast, is a linear sequence.
Incorrect
Correct Answer: B
Explanation: A food web is a network of interconnected food chains in an ecosystem. It reflects the complex feeding relationships and provides alternative food sources, increasing the resilience of the ecosystem. A food chain, in contrast, is a linear sequence.
Question 2 of 5
2. Question
Which of the following best explains why the pyramid of energy is always upright?
Correct
Correct Answer: D
Explanation: The pyramid of energy is always upright because energy is lost at each trophic level through respiration, heat, and metabolic activities, and only about 10% is passed on. This makes the energy base widest at the bottom and narrower at the top.
Incorrect
Correct Answer: D
Explanation: The pyramid of energy is always upright because energy is lost at each trophic level through respiration, heat, and metabolic activities, and only about 10% is passed on. This makes the energy base widest at the bottom and narrower at the top.
Question 3 of 5
3. Question
Consider the following characteristics:
1. Autotrophic and photosynthetic
2. Drifts with water currents
3. Forms the base of the aquatic food chain
4. Microscopic but visible in masses as colored patches
These features are most appropriately associated with:
Correct
Correct Answer: B
Explanation: Phytoplankton are microscopic autotrophs that float with water currents and perform photosynthesis, making them the primary producers of aquatic ecosystems. Their large colonies appear as colored patches on water surfaces.
Incorrect
Correct Answer: B
Explanation: Phytoplankton are microscopic autotrophs that float with water currents and perform photosynthesis, making them the primary producers of aquatic ecosystems. Their large colonies appear as colored patches on water surfaces.
Question 4 of 5
4. Question
In the context of food chains and energy transfer, which of the following statements is/are correct?
1. Energy transfer efficiency between two successive trophic levels is limited by the 10% law.
2. Trophic efficiency includes only the energy used for growth and reproduction by the consumer.
3. The existence of more than four or five trophic levels in a natural ecosystem is rare due to energy limitations.
Select the correct answer using the code below:
Correct
Correct Answer: D
Explanation:
Statement 1 is correct: According to the 10% law, only about 10% of energy is transferred from one trophic level to the next.
Statement 2 is correct: Trophic efficiency refers to the energy actually assimilated and used for growth and reproduction, not what’s lost to metabolism or heat.
Statement 3 is correct: Due to substantial energy loss at each level, natural ecosystems typically do not have more than 4–5 trophic levels—energy becomes insufficient beyond that.
Incorrect
Correct Answer: D
Explanation:
Statement 1 is correct: According to the 10% law, only about 10% of energy is transferred from one trophic level to the next.
Statement 2 is correct: Trophic efficiency refers to the energy actually assimilated and used for growth and reproduction, not what’s lost to metabolism or heat.
Statement 3 is correct: Due to substantial energy loss at each level, natural ecosystems typically do not have more than 4–5 trophic levels—energy becomes insufficient beyond that.
Question 5 of 5
5. Question
Which of the following statements about biomagnification is/are correct?
1. The pollutant must be water-soluble and easily excreted.
2. The pollutant must be long-lived and fat-soluble.
3. Biomagnification causes a decrease in pollutant concentration at higher trophic levels.
Select the correct answer using the code below:
Correct
Correct Answer: B
Explanation:
Statement 1 is incorrect: Water-soluble pollutants are easily excreted and do not bioaccumulate.
Statement 2 is correct: For biomagnification to occur, pollutants must be fat-soluble and persistent (like DDT).
Statement 3 is incorrect: The concentration of the pollutant increases at higher trophic levels.
Incorrect
Correct Answer: B
Explanation:
Statement 1 is incorrect: Water-soluble pollutants are easily excreted and do not bioaccumulate.
Statement 2 is correct: For biomagnification to occur, pollutants must be fat-soluble and persistent (like DDT).
Statement 3 is incorrect: The concentration of the pollutant increases at higher trophic levels.
