Samacheer Kalvi EM 12 Bio - Botany Unit9 Chapter8 MCQs Mock Test

12th Bio - Botany Mock Test

Chapter 8: Environmental Issues

Choose the correct answer from the multiple choices, then click "Next" to goto next question and click "OK" after seeing the score.

 

1. Which of the following would most likely help to slow down the greenhouse effect?
   1.   Converting tropical forests into grazing land for cattle.
   2.   Ensuring that all excess paper packaging is buried to ashes.
   3.   Redesigning landfill dumps to allow methane to be collected.
   4.   Promoting the use of private rather than public transport.
2. With respect to Eichhornia
   Statement A: It drains off oxygen from water and is seen growing in standing water.
   Statement B: It is an indigenous species of our country.
   1.   Statement A is correct and Statement B is wrong.
   2.   Both Statements A and B are correct.
   3.   Statement A is correct and Statement B is wrong.
   4.   Both statements A and B are wrong.
3. Find the wrongly matched pair.
   1.   Endemism – Species confined to a region and not found anywhere else.
   2.   Hotspots – Western ghats
   3.   Ex-situ Conservation – Zoological parks
   4.   Sacred groves – Saintri hills of Rajasthan
   5.   Alien sp Of India – Water hyacinth
4. Depletion of which gas in the atmosphere can lead to an increased incidence of skin cancer?
   1.   Ammonia
   2.   Methane
   3.   Nitrous oxide
   4.   Ozone
5. One green house gas contributes 14% of total global warming and another contributes 6%. These are respectively identified as
   1.   N₂O and CO₂
   2.   CFCs and N₂O
   3.   CH₄ and CO₂
   4.   CH₄ and CFCS
6. One of the chief reasons among the following for the depletion in the number of species making endangered is
   1.   over hunting and poaching
   2.   green house effect
   3.   competition and predation
   4.   habitat destruction
7. Deforestation means
   1.   growing plants and trees in an area where there is no forest
   2.   growing plants and trees in an area where the forest is removed
   3.   growing plants and trees in a pond
   4.   removal of plants and trees
8. Deforestation does not lead to
   1.   Quick nutrient cycling
   2.   Soil erosion
   3.   alternation of local weather conditions
   4.   Destruction of natural habitat weather conditions
9. The unit for measuring ozone thickness
   1.   Joule
   2.   Kilos
   3.   Dobson
   4.   Watt
10. People’s movement for the protection of environment in Sirsi of Karnataka is
    1.   Chipko movement
    2.   Amirtha Devi Bishwas movement
    3.   Appiko movement
    4.   None of the above
11. The plants which are grown in silivpasture system are
    1.   Sesbania and Acacia
    2.   Solenum and Crotalaria
    3.   Clitoria and Begonia
    4.   Teak and sandal

Samacheer Kalvi EM 12th Std Bio - Botany Unit 9 Chapter 8 MCQs Mock Test Instructions

Chapter 8: Environmental Issues

Here you will find 11 MCQs questions and options. Read the questions carefully and select the appropriate answer for the question by selecting/clicking the box before the option. A pop-up box will open by displaying the result of the option selected. The result of each question will be based on percentages. Each question will have 3 chances to select the right option and for every chance, the percentage of scores will be reduced. Likewise, the remaining questions also take place. The overall percentage scored will be displayed at the completion of the mock test.

Note: Every time the page loads, the question and options will be randomized and takes you to the beginning of the particular exercise.

Button Navigations:

The Below Image shows the button navigations.

• The Home Button On the Top and Bottom Navigates to the Homepage of the Subject (Example: To Bio - Botany if the mock test is taken from Bio - Botany).
• The Next Chapter Button on the Top and Bottom Navigates to the Next Chapter (Example: From Chapter 8 to Chapter 9 and so on).
• The Prev Chapter Button on the Top and Bottom Navigates to the Prev Chapter (Example: From Chapter 8 to Chapter 7 and so on).
• The Next Button next to the question numbers Navigates to the Next Question (Example: From 1 to 2 and so on).
• The Show All Questions Button Displays all the questions and options of that exercise on a single page.
• The Option Box Icon (Box with Question mark icon), is the box that is to be selected for the correct option. By selecting/clicking the option box, a pop-up box will open by displaying the result of the option selected.