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Which of the following statements regarding the photic zone of an aquatic ecosystem is/are correct?
- It is the lowest layer of the aquatic ecosystem, where light penetration is restricted.
- Both photosynthesis and respiration activities take place in this region.
Select the correct answer using the code given below:
- a)1 only
- b)2 only
- c)Both 1 and 2
- d)Neither 1 nor 2
Correct answer is option 'B'. Can you explain this answer?
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Most Upvoted Answer
Which of the following statements regarding the photic zone of an aqua...
Based on light penetration and plant distribution, aquatic ecosystems are classified as photic and aphotic zones
Photic zone: Photic zone (euphotic zone, epipelagic zone) is the uppermost layer of the ocean that receives sunlight, enabling it to perform photosynthesis. It undergoes a series of physical, chemical, and biological processes that supply nutrients into the upper water column. So, statement 1 is not correct.
The photic zone is home to the majority of marine life, due to its location. Ninety per cent of marine life lives in the photic zone, which is approximately two hundred meters deep. This includes phytoplankton (plants), including dinoflagellates, diatoms, cyanobacteria, and zooplankton, which are known as the consumers in the photic zone. Both photosynthesis and respiration activities take place in this zone. So, statement 2 is correct.
Aphotic zone is the portion of a lake or ocean where there is little or no sunlight. It is formally defined as the depths beyond which less than 1% of sunlight penetrates. The aphotic zone is positioned below the littoral and photic zones to the bottom of the lake, where light levels are too low for photosynthesis. Respiration occurs at all depths, so the aphotic zone is a region of oxygen consumption. Only respiration activities take place this
deep, the unlit region is also known as the profundal zone.
Therefore, the correct answer is (b).
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Which of the following statements regarding the photic zone of an aqua...
Explanation:
The photic zone is the uppermost layer of an aquatic ecosystem, where light penetration is sufficient to support photosynthesis. This zone is characterized by the presence of sunlight and is the primary location for photosynthetic activity in the ecosystem.
Statement 1: It is the lowest layer of the aquatic ecosystem, where light penetration is restricted.
This statement is incorrect. The photic zone is actually the uppermost layer of the aquatic ecosystem, where light can penetrate. It is the region where photosynthesis takes place and is characterized by high levels of light availability.
Statement 2: Both photosynthesis and respiration activities take place in this region.
This statement is correct. The photic zone is the region where photosynthesis occurs, as it provides the necessary sunlight for the process. Photosynthesis is the process by which plants and other organisms convert light energy into chemical energy, producing oxygen and organic compounds. Additionally, respiration also takes place in the photic zone. Respiration is the process by which organisms use oxygen to convert organic compounds into energy, releasing carbon dioxide as a byproduct.
Therefore, the correct answer is option 'B' - 2 only.
The photic zone is the uppermost layer of an aquatic ecosystem, where light penetration is sufficient to support photosynthesis. This zone is characterized by the presence of sunlight and is the primary location for photosynthetic activity in the ecosystem.
Statement 1: It is the lowest layer of the aquatic ecosystem, where light penetration is restricted.
This statement is incorrect. The photic zone is actually the uppermost layer of the aquatic ecosystem, where light can penetrate. It is the region where photosynthesis takes place and is characterized by high levels of light availability.
Statement 2: Both photosynthesis and respiration activities take place in this region.
This statement is correct. The photic zone is the region where photosynthesis occurs, as it provides the necessary sunlight for the process. Photosynthesis is the process by which plants and other organisms convert light energy into chemical energy, producing oxygen and organic compounds. Additionally, respiration also takes place in the photic zone. Respiration is the process by which organisms use oxygen to convert organic compounds into energy, releasing carbon dioxide as a byproduct.
Therefore, the correct answer is option 'B' - 2 only.
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Which of the following statements regarding the photic zone of an aquatic ecosystem is/are correct? It is the lowest layer of the aquatic ecosystem, where light penetration is restricted. Both photosynthesis and respiration activities take place in this region.Select the correct answer using the code given below:a)1 onlyb)2 onlyc)Both 1 and 2d)Neither 1 nor 2Correct answer is option 'B'. Can you explain this answer?
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