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Ozone prevents the entry of
Options
(a) infrared rays
(b) visible rays
(c) UV rays
(d) X-rays
Correct Answer:
UV rays
Explanation:
Ozone layer or shield is present in stratosphere which is also called ozonosphere. It lies at an altitude of 23-25 km over equator and its concentration is 300 dobsons. It functions as a shield against strong UV radiations. Protection from UV radiations is proportional to thickness of ozone layer. Depletion in the concentration of ozone over a restricted area as spring time decline over Antartica is called ozone hole. Thinning of ozone layer increases the amount of UV-B radiations reaching the earth. It would increase occurence of cataracts, skin cancers, herpes, dimming of eye sight, photoburning, deficient functioning of immune system.
Related Questions: - Measuring Biochemical Oxygen Demand (BOD) is a method used for :
- If both the anthers and filaments are fused together to form
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Topics: Conservation and Environmental Issues
(111)
Subject: Biology
(4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Measuring Biochemical Oxygen Demand (BOD) is a method used for :
- If both the anthers and filaments are fused together to form
- Single membrane bound organelle is
- Number of (approximately) genes in E. coil are
- Venation is a term used to describe the pattern of arrangement of
Topics: Conservation and Environmental Issues (111)
Subject: Biology (4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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