| ⇦ | 
| ⇨ |
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: - Most of the tree dwellers are found in which type of forest?
- Heartwood differs from sapwood in:
- Measuring Biochemical Oxygen Demand (BOD) is a method used for :
- Which of the following surrounds the vacuole?
- Increased asthmatics attacks in certain seasons are related to
Topics: Conservation and Environmental Issues
(111)
Subject: Biology
(4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Most of the tree dwellers are found in which type of forest?
- Heartwood differs from sapwood in:
- Measuring Biochemical Oxygen Demand (BOD) is a method used for :
- Which of the following surrounds the vacuole?
- Increased asthmatics attacks in certain seasons are related to
Topics: Conservation and Environmental Issues (111)
Subject: Biology (4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
18000+ students are using NEETLab to improve their score. What about you?
Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.
Share this page with your friends
Leave a Reply