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

How did ozone layer formation affect geographical expansion of life on Earth?

Answer and explanation

Correct answer: Safety for life increased in land areas

The direct answer is A: safety for life increased in land areas. The early atmosphere did not protect life well from harmful ultraviolet radiation. When oxygen accumulated, some oxygen changed into ozone, forming an ozone layer high in the atmosphere. Ozone absorbs much of the Sun’s harmful ultraviolet radiation. Step by step: oxygen increased; ozone formed; ultraviolet danger at the surface decreased; organisms could survive more safely outside water; life could gradually expand onto land. Option A is correct because land life received greater protection. Option B is wrong because life did not become limited to Earth’s core, which is extremely hot and unsuitable for life. Option C is wrong because ozone did not destroy oceans; oceans remained important for life. Option D is wrong because ozone is part of the atmosphere and did not make the atmosphere disappear. The careful idea is not that ozone alone created all land life, but that it removed an important radiation barrier to terrestrial expansion. Memory cue: ozone means ultraviolet shield, and shield means safer land.

Related tags

OzoneLife ExpansionLand

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.