Question
Hard
Solving time: 3 mins
A lake near a village suffered heavy mortally of fishes within a few days. Consider the following reasons for this.
(A) Lots of urea and phosphate fertilizer were used in the crops in the vicinity
(B) The area was sprayed with DDT by an aircraft
(C) The lake water tumed green and stinky
(D) Phytoplankton populations in the lake declined intially thereby greatly reducing photosynthesis
Which two of the above were the main causes of fish mortality in the lake?
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Text solutionVerified
Correct answer is A
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Uploaded on: 4/20/2023
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Uploaded on: 6/28/2022
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Question Text | A lake near a village suffered heavy mortally of fishes within a few days. Consider the following reasons for this. (A) Lots of urea and phosphate fertilizer were used in the crops in the vicinity (B) The area was sprayed with DDT by an aircraft (C) The lake water tumed green and stinky (D) Phytoplankton populations in the lake declined intially thereby greatly reducing photosynthesis Which two of the above were the main causes of fish mortality in the lake? |
Updated On | Apr 20, 2023 |
Topic | Environmental Issues |
Subject | Biology |
Class | Class 12 |
Answer Type | Text solution:1 Video solution: 3 |
Upvotes | 423 |
Avg. Video Duration | 2 min |