The zonels where no penetration of light occurs in a like:
Correct answer: D. Profundal zone
- A. Littoral zone
- B. Limnetic zone
- C. Both (a) & (b)
- D. Profundal zone
Explanation
In a lake, the profundal zone lies below the effective light-penetration level, so photosynthesis is absent or negligible there. The littoral and limnetic zones receive sufficient light for aquatic plant or algal production.
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