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If ozone layer developed late what would be the effect on expansion of life from sea to land?

Answer and explanation

Correct answer: Ultraviolet risk for land life would remain longer

The direct answer is A: ultraviolet risk for land life would remain longer. Oxygen accumulation helped ozone formation, and ozone absorbed much harmful ultraviolet radiation. If ozone developed late, the protective shield would also appear late. Therefore organisms moving from water to land would face stronger radiation for a longer period, making expansion of land life more difficult or delayed. Option A states this direct consequence. Option B is unrelated: delayed ozone does not remove metals from the core. Option C is wrong because it would not automatically restore the first atmosphere. Option D is wrong because ozone timing does not make oceans dry earlier. The correct chain is oxygen accumulation, ozone formation, ultraviolet protection, and wider land-life possibility.

Related tags

Ozone DelayLand LifeUltraviolet Radiation

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