Update

Muft Shiksha™ एक 100% Free Education Portal है 🇮🇳, जिसका उद्देश्य Class 9–12 के हर विद्यार्थी तक High-Quality Education को पूरी तरह मुफ्त पहुँचाना है। 🇮🇳 हम मानते हैं कि अच्छी शिक्षा किसी student की आर्थिक स्थिति पर निर्भर नहीं होनी चाहिए। 🇮🇳 हर विद्यार्थी को वही Quality Study Material, MCQs, Quizzes, Exam Preparation, Concept-Based Learning और Bilingual Support मिलना चाहिए, जो आमतौर पर महंगी Coaching या Premium Platforms में मिलता है। Muft Shiksha™ 🇮🇳 इसी सोच के साथ बनाया गया है

Subjects
0 reads0 ratings0 helpful

What can be the effect of pollution on river biodiversity?

Answer and explanation

Correct answer: Number and health of aquatic organisms may decline

Direct answer: Option A, the number and health of aquatic organisms may decline. Pollution means harmful substances enter water. Sewage, chemicals, plastic, oil, and excess fertilisers can make water unsafe. Some pollutants reduce dissolved oxygen, while others poison organisms or destroy their food and breeding places. Therefore river biodiversity, meaning the variety of living organisms, becomes poorer. A is correct because polluted water can reduce both population and health. B is wrong because pollution does not make all organisms increase, and they do not increase immediately. C is wrong because pollution often lowers oxygen; it does not always enrich water. D is wrong because pollution changes water quality and the river ecosystem. Memory cue: pollution usually means less clean water, less oxygen, and less biodiversity.

Related tags

PollutionBiodiversityAquatic Organisms

Was this question useful?

No ratings yetWrite a review / Rate this question

Student Reviews

No published reviews yet.

Add Muft Shiksha to your Home Screen

In Safari, tap Share, then Add to Home Screen.