Suppose the water of a lake is contaminated by a pesticide. Arrange the…
2026
Suppose the water of a lake is contaminated by a pesticide. Arrange the following in the increasing order of accumulated concentration of the pesticide in the lake ecosystem.
A. Water
B. Zooplankton
C. Phytoplankton
D. Fish
Choose the correct answer from the options given below:
मान लीजिए कि एक झील का पानी कीटनाशक से प्रदूषित हो गया है। झील पारिस्थितिकी तंत्र में कीटनाशक के संचय की बढ़ती हुई मात्रा के क्रम में निम्नलिखित को व्यवस्थित करें।
A. जल
B. जूप्लवक (Zooplankton)
C. फाइटोप्लवक (Phytoplankton)
D. मछली
नीचे दिए गए विकल्पों में से सही उत्तर चुनिए:
- A.
B, C, D, A
- B.
A, B, C, D
- C.
A, C, B, D
- D.
C, B, D, A
Attempted by 18 students.
Show answer & explanation
Correct answer: C
This question involves the concept of biomagnification, where toxic substances accumulate in higher concentrations at successive trophic levels. Pesticides enter the water (A) first. Phytoplankton (C), as primary producers, absorb some concentration from the water. Zooplankton (B) consume phytoplankton, accumulating higher levels. Fish (D), being at a higher trophic level consuming zooplankton, accumulate the highest concentration. Thus, the increasing order is Water (A) < Phytoplankton (C) < Zooplankton (B) < Fish (D).