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Consider the following statements about the Photic zone:
1. It is the lighted and usually well-mixed portion that extends from the lake surface down to where the light level is 1% of that at the surface.
2. Respiration activity takes place.
3. The depth of this zone depends on the transparency of water.
Which of these statements is/are correct?
  • a)
    1 and 2 Only
  • b)
    2 and 3 Only
  • c)
    1 and 3 Only
  • d)
    All of the above
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
Consider the following statements about the Photic zone:1. It is the ...
Photic zone:
  • It is the upper layer of the aquatic ecosystems, up to which light penetrates and within which photosynthetic activity is confined.
  • The depth of this zone depends on the transparency of water.
  • Both photosynthesis and respiration activity takes place.
  • The Phototic (or “euphotic”) zone is the lighted and usually well-mixed portion that extends from the lake surface down to where the light level is 1% of that at the surface.
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Community Answer
Consider the following statements about the Photic zone:1. It is the ...
Explanation:

1. Photic Zone Definition:
- The first statement is correct. The photic zone is the lighted and usually well-mixed portion of a lake that extends from the surface down to where the light level is 1% of that at the surface.

2. Respiration Activity:
- The second statement is also correct. Respiration activity takes place in the photic zone, as it is the layer where photosynthetic organisms like algae and phytoplankton can thrive and produce oxygen through photosynthesis.

3. Depth Dependence on Water Transparency:
- The third statement is correct as well. The depth of the photic zone depends on the transparency of the water. Clearer water allows light to penetrate deeper, resulting in a deeper photic zone, while murky or turbid water may limit the depth of the zone.
Therefore, all the given statements about the photic zone are correct. It is an essential layer in lakes where light penetration supports primary production and sustains the aquatic ecosystem.
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Consider the following statements about the Photic zone:1. It is the lighted and usually well-mixed portion that extends from the lake surface down to where the light level is 1% of that at the surface.2. Respiration activity takes place.3. The depth of this zone depends on the transparency of water.Which of these statements is/are correct?a) 1 and 2 Onlyb) 2 and 3 Onlyc) 1 and 3 Onlyd) All of the aboveCorrect answer is option 'D'. Can you explain this answer?
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