How UV radiation is harmful to terrestrial life 1 It accelerates ageing of skin in humans 2 It can k...........

Environment and Ecology Air Pollution

Download Solution PDF

How UV radiation is harmful to terrestrial life?

1. It accelerates ageing of skin in humans.

2. It can kill phytoplankton in large numbers.

3. Plant proteins are adversely affected by UV radiation.

4. It may lead to harmful mutation of plant cells.

Select the correct answer using the codes below.

1 and 4 only

2 and 3 only

1, 2 and 4 only

1, 2, 3 and 4

छोटे Courses बड़े Results

Master Air Pollution

Prepare through Micro-courses

Try Now

Explanation:

Justification: Statement 1: With the depletion of ozone layer, more UV radiation filters into troposphere. UV radiations lead to ageing of skin, cataract, sunburn and skin cancer in humans.

Statement 2: Many phytoplankton cannot tolerate the bright, unfiltered solar radiation at the ocean's surface and are impaired especially by the high-energy, short-wavelength radiation in the UV range of the spectrum.

Statement 3 and 4: UV-B impairs photosynthesis in many species. Overexposure to UV-B reduces size, productivity, and quality in many of the crop plant species. UV-B increases plants’ susceptibility to disease by sometimes causing mutations or damaging plant proteins. Learning: It also increases evaporation of surface water through the stomata of the leaves and decreases the moisture content of the soil. Increase in UV radiations damage paints and fibres, causing them to fade faster.