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

In which situation will biological weathering be most clearly visible?

Answer and explanation

Correct answer: Tree roots are widening a wall crack

Biological weathering occurs when living organisms help break down or weaken rock. A tree root growing inside a crack is a clear example: as the root becomes larger, it presses against the crack and may widen it. Burrowing animals, lichens, and plant activity can also contribute to biological weathering. The key test is whether a living organism has a direct role in changing the rock.

Option A is correct because tree roots are living agents actively widening a wall crack. Limestone dissolving in acidic water is chemical weathering, not biological weathering by itself. Expansion and contraction caused by day-night heating is physical weathering, while iron turning reddish brown through reaction with oxygen is chemical oxidation. Thus the first situation gives the clearest evidence of biological action.

Related tags

Biological WeatheringRoot GrowthExample

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.