HSC Science (General) इयत्ता १२ वी - Maharashtra State Board Important Questions for Biology

_________ is used for desalination of brackish water.

Give scientific reasons:

Ozone present in the stratosphere is called as “good ozone”.

Define pollution. “Industries are pouring poison in water” - Explain

Which of the following harmful radiation is absorbed by the ozone layer of the stratosphere?

Attempt any TWO of the following: 

Define ‘deforestation’. Comment on its effects

The permanent removal of forests and woodlands is called ---------------

‘There is a hole in the ozone layer’. What do you understand by this?

Agricultural water pollution and Shipping water pollution. 

The depletion of the ozone layer is due to ______.

Suggest measures to conserve the forests. 

Observe the graph and select the correct option:

Enlist any six categories into which a given species is placed once it has been thoroughly evaluated by IUCN.

Write a short note on the greenhouse effect.

How many Biodiversity hotspots have been identified around the world?

______ was signed in 1987 to control emission of ozone depleting substances.

Lesser variation in biomass production over a period of time is called ______.

Rivet Popper Hypothesis is an analogy to explain the significance of ______.

Which device is used to clean both dust and gases from polluted air?

What is ex-situ conservation?

Mention any two places where the ex-situ conservation is undertaken.