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CBSE 12th Standard Biology Subject Biodiversity and Conservation Ncert Exemplar 1 Marks Questions With Solution 2021

Published on: 25/05/2021

QB365 Provides the updated NCERT Examplar Questions for Class 12 Biology, and also provide the detail solution for each and every ncert examplar questions , QB365 will give all kind of study materials will help to get more marks

Download CBSE Class 12th Standard CBSE Biology question papers, sample papers, important questions, and previous year solved papers in PDF format. Get free study materials, NCERT solutions, and exam preparation resources for Class 12th Standard CBSE Biology

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Std: 12th Standard CBSE - Biology

chapter: - NCERT Exemplers

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Questions:

1 Marks

9 x 1 = 9

Where is good ozone present? Why is it called so?

Will climate change bring benefits to some areas?

In global warming real, only a theory or speculation?

It is a common practice to undertake desilting of the overhead water tanks. What is the possible source of silt that gets deposited in water tanks?

In which year the AIR (Prevention and control of Pollution) Act amended to include noise as air pollution?

What are biodegradable pollutants? Give one example

Name the types of pollutants according to their natural disposal.

What is expandend form of IUCN?

What is the difference between endemic and exotic species?

Generic 2

1 x 2 = 2

10.

Is it true that there is more solar energy available in the tropics? Explain briefly.

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Answers Key:

1 Marks

9 x 1 = 9

()
Good ozone is present in stratosphere, the upper part of atmosphere. It is called 'good ozone' because it acts as a shield absorbing ultraviolet radiation from sun.

()
As a result global warming and climate change, regions such as Siberia will likely become warmer and more habitable. The growing seasons in some regions will lengthen, as spring will arrive earlier and winter frosts set in later.

()
Global warming is real and has been with us for sometime, increasingly during the past two decades but gradually for more than a hundred years. The reality of it is seen direct temperature measurements and also in the melting of glaciers in low latitudes, permafrost decay in Alaska and the decrease in sea-ice cover in Arctic.

()
Soil particles carried by water from the supply source.

()
1987

()
That are quickly degraded by natural means, e.g., sewage.

()
Biodegradable and nondegradable.

()
International union for conservation of nature and natural resources.

()
1. Endermic species are restricted and native to a particular geographical region
2. Exotic species are those introduced into a region from other geographical regions.

Generic 2

1 x 2 = 2

10.

Yes, there is more solar energy available in the tropics because
(i) As one moves from equator to the polar regions, the length of the day decreases and the length of the night increases.
(ii) In the tropical regions, the length of the day is almost equal to the length of the night, hence it has more solar energy available.