Exams › NEET › Biology

Which one of the following statements is correct?

1. At present it is not possible to grow maize without chemical fertilizers.
2. Extensive use of chemical fertilizer may lead to eutrophication of nearby water bodies.
3. Both Azotobacter and Rhizobium fix atmospheric nitrogen in root nodules of plants.
4. Cyanobacteria such as Anabaena and Nostoc are important mobilizers of phosphates and potassium for plant nutrition in the soil.

Correct answer: Extensive use of chemical fertilizer may lead to eutrophication of nearby water bodies.

Solution

Excess chemical fertilizers can be carried by rainwater into nearby water bodies, adding too much nitrogen and phosphorus. This nutrient overload promotes algal blooms and oxygen depletion, which is eutrophication.

Related NEET Biology questions

• What are the chief pollutants of the atmosphere, which are most likely to deplete the ozone layer?
• An anti-forest measure is
• Fern plants reproduce by
• In rabbit and humans, the kidney is
• Snake's venom is
• Hydra reproduces by budding. This is an example of

⚔️ Practice NEET Biology free + battle 1v1 →