Assertion (A) is true: Mahua oil cake is indeed used for pond manuring to enhance fertility and productivity, and it also acts as an effective piscicide for removing unwanted predatory and weed fish before stocking. Reason (R) is also true and provides the correct explanation: Mahua oil cake contains rotenone (a naturally occurring compound), which is a potent fish poison. Rotenone disrupts cellular respiration in fish, leading to their death. The presence of rotenone is the direct mechanism by which Mahua oil cake functions as a fish poison, thus explaining its use for eradicating fish.
Assertion (A) : Mahua oil cake is used for manuring as well as an effective agent for eradication of predatory and weed fishes. Reason (R) : Mahua oil cake contains Rotenone (about 4-6%) which is an effective fish poison. Choose the correct answer : - Question not attempted
Asked in Asst. Fisheries Development Officer 2024 · Topic: Plant Nutrition (Essential Mineral Elements: Criteria for essentiality and classification)
Show answer
Answer: A. Both (A) and (R) are true and (R) is a correct explanation of (A).
More Biology questions
- Plants receive their nutrients mainly from
- Which chemical fertilizer is essential for better rhizobial nitrogen fixation?
- Plants receive nutrients from
- Which of the following clay mineral is dominant in red soil ?
- Parameter that indicates the water's buffering capacity and resistance to pH changes - Question not attempted
- A list of some soil textures is given below: A. Clay loam B. Silty clay C. Sandy clay D. Silty clay loam Which of these are suitable for fish ponds?
- Which is high salt tolerant crop ?
- What is Hydroponics ?