TN State Board Samacheer Kalvi Online Test for 11th Std - Biology - English - Bio Botany - Environmental Issues

Question 1 Of 10

With respect to Eichhornia.

Statement A is correct and Statement B is wrong. Both Statements A and B are correct. Statement A is correct and Statement B is wrong. Both Statements A and Bare wrong.

Question 2 Of 10

People’s movement for the protection of environment in sirsi of Karnataka is

Chipko movement Amirtha Devi Bishwas movement Appiko movement None of the above

Question 3 Of 10

Deforestation means

growing plants and trees in an area where there is no forest growing plants and trees in an area where the forest is removed growing plants and trees in a pond removal of plants and trees

Question 4 Of 10

Depletion of which gas in the atmosphere can lead to an increased incidence of skin cancer?

Ammonia Methane Nitrous oxide Ozone

Question 5 Of 10

One green house gas contributes 14% of total global warming and another contributes 6%. These are respectively identified as

N2O and CO2 CFCS and N2O CH4 and CO2 CH4 and CFCS

Question 6 Of 10

Deforestation does not lead to

Quick nutrient cycling soil erosion alternation of local weather conditions Destruction of natural habitat weather conditions

Question 7 Of 10

The unit for measuring ozone thickness

Joule Kilos Dobson Watt

Question 8 Of 10

Which of the following would most likely help to slow down the greenhouse effect.

Converting tropical forests in to grazing land for cattle. Ensuring that all excess paper packing is buried to ashes. Redesigning landfill dumps to allow methane to be collected. Promoting the use of private rather than puplic transport.

Question 9 Of 10

One of the chief reasons among the following for the depletion in the number of species making endangered is.

over hunting and poaching green house effect competition and predation habitat destruction

Question 10 Of 10

Find the wrongly matched pair.

Endemism – Species confined to a region and not found anywhere else. Hotspots – Western ghats. Ex-situ Conservation – Zoological parks. Alien sp. Of India – Water hyacinth.

Tamil Nadu State Board ( Samacheer Kalvi ) Online Test based on Book Back Questions - 11th Standard Biology - English Medium - Bio Botany - Environmental Issues

Samacheer Kalvi 11th Biology - Bio Botany - Environmental Issues - Book Back Questions in English Medium