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
E. Bird
Choose the correct answer from the options given below:मान लीजिए किसी झील का जल एक पीड़कनाशी (pesticide) से संदूषित है। झील के पारितंत्र में पीड़कनाशी की संचित सांद्रता के बढ़ते क्रम में निम्नलिखित को व्यवस्थित कीजिए:
A. जल
B. प्राणिप्लवक (Zooplankton)
C. पादपप्लवक (Phytoplankton)
D. मछली
E. पक्षी
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Correct answer: C. A, C, B, D, E
Explanation
Persistent pesticides such as DDT undergo biomagnification: concentration rises at each higher trophic level. The food chain is water → phytoplankton (producers) → zooplankton → fish → fish-eating birds. Hence A, C, B, D, E.DDT जैसे स्थायी पीड़कनाशियों का जैव-आवर्धन (biomagnification) होता है: प्रत्येक उच्चतर पोषी स्तर पर सांद्रता बढ़ती है। खाद्य श्रृंखला है: जल → पादपप्लवक (उत्पादक) → प्राणिप्लवक → मछली → मछली खाने वाले पक्षी। अतः A, C, B, D, E।More People, Development and Environment questions
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