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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
Questions + Answers key
Take MCQ Biology Test1.
Where is good ozone present? Why is it called so?
2.
Will climate change bring benefits to some areas?
3.
In global warming real, only a theory or speculation?
4.
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?
5.
What are biodegradable pollutants? Give one example
6.
Name the types of pollutants according to their natural disposal.
7.
What are the 5 main types of pollution?
8.
Define (i) Bioprospecting (ii) Endemism.
9.
What does the term frugivorous mean?
10.
What is Red Data Book?
1.
( )
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.
2.
( )
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.
3.
( )
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.
4.
( )
Soil particles carried by water from the supply source.
5.
( )
That are quickly degraded by natural means, e.g., sewage.
6.
( )
Biodegradable and nondegradable.
7.
( )
Water, air, soil, radioactive and noise pollution
8.
( )
Bio-prospecting: The search for new medicinal or nutritional or agricultural products from natural sources, such as micro-organisms, plants and sometime animals.
Endemism: It refers to degree of uniqueness of flora and fauna in region. For example, in India it is 47% and in Cocos island is 100%.
9.
( )
Fruit eating.
10.
( )
Red Data Book or Red list is a catalogue of species under varied degree of threat of extinction which is issued by IUCN from time to alert ecologists for their protection.
12th Standard CBSE Syllabus & Materials
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