Samacheer Kalvi EM 12 Bio - Botany Unit9 Chapter6 MCQs Mock Test

12th Bio - Botany Mock Test

Chapter 6: Principles of Ecology

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

 

1. Arrange the correct sequence of ecological hierarchy starting from lower to higher level.
   1.   Individual organism → Population Landscape → Ecosystem
   2.   Landscape → Ecosystem → Biome → Biosphere
   3.   community → Ecosystem → Landscape → Biome
   4.   Population → organism → Biome → Landscape
2. Ecology is the study of an individual species is called
   (i) Community ecology
   (ii) Autecology
   (iii) Species ecology
   (iv) Synecology
   1.   i only
   2.   ii only
   3.   i and iv only
   4.   ii and iii only
3. A specific place in an ecosystem, where an organism lives and performs its functions is
   1.   habitat
   2.   niche
   3.   landscape
   4.   biome
4. Read the given statements and select the correct option.
   (i) Hydrophytes possess aerenchyma to support themselves in water.
   (ii) Seeds of Viscum are positively photoblastic as they germinate only in presence of light.
   (iii) Hygroscopic water is the only soil water available to roots of plant growing in soil as it is present inside the micropores.
   (iv) High temperature reduces use of water and solute absorption by roots.
   1.   i, ii, and iii only
   2.   ii, iii and iv
   3.   ii and iii only
   4.   i and ii only
5. Which of the given plant produces cardiac glycosides?
   1.   Calotropis
   2.   Acacia
   3.   Nepenthes
   4.   Utricularia
6. Read the given statements and select the correct option.
   (i) Loamy soil is best suited for plant growth as it contains a mixture of silt, sand and clay.
   (ii) The process of humification is slow in case of organic remains containing a large amount of lignin and cellulose.
   (iii) Capillary water is the only water available to plant roots as it is present inside the micropores.
   (iv) Leaves of shade plant have more total chlorophyll per reaction centre, low ratio of chl a and chl b are usually thinner leaves.
   1.   i, ii and iii only
   2.   ii, iii and iv only
   3.   i, ii and iv only
   4.   ii and iii only
7. Read the given statements and select the correct option.
   Statement A: Cattle do not graze on weeds of Calotropis.
   Statement B: Calotropis have thorns and spines, as defense against herbivores.
   1.   Both statements A and B are incorrect.
   2.   Statement A is correct but statement B is incorrect.
   3.   Both statements A and B are correct but statement B is not the correct explanation of statement A.
   4.   Both statements A and B are correct and statement B is the correct explanation of statement A.
8. In soil water available for plants is
   1.   gravitational water
   2.   chemically bound water
   3.   capillary water
   4.   hygroscopic water
9. Read the following statements and fill up the blanks with correct option.
   i) Total soil water content in soil is called __________
   ii) Soil water not available to plants is called __________
   iii) Soil water available to plants is called __________
   1.   i) Holard ii) Echard iii) Cheresard
   2.   i) Echard ii) Holard iii) Cheresard
   3.   i) Cheresard ii) Echard iii) Holard
   4.   i) Holard ii) Cheresard iii) Echard
10. Column I represent the size of the soil particles components and Column II represents type of soil components. Which of the following is correct match for the Column I and Column II
    
    
    1.   ii, iii, iv and i
    2.   iv, i, iii and ii
    3.   i, ii, i and iv
    4.   None of the above
11. The plant of this group are adapted to live partly in water and partly above substratum and free from water
    1.   Xerophytes
    2.   Mesophytes
    3.   Hydrophytes
    4.   Halophytes
12. Identify the A, B, C and D in the given table:
    
    
    
    
    1.   a
    2.   b
    3.   c
    4.   d
13. Ophrys an orchid resembling the female of an insect so as to able to get pollinated is due to phenomenon of
    1.   Myrmecophily
    2.   Ecological equivalents
    3.   Mimicry
    4.   None of these
14. A free living nitrogen fixing cyanobacterium which can also form symbiotic association with the water fern Azolla
    1.   Nostoc
    2.   Anabaena
    3.   Chlorella
    4.   Rhizobium
15. Pedogenesis refers to
    1.   Fossils
    2.   Water
    3.   Population
    4.   Soil
16. Mycorrhiza promotes plant growth by
    1.   Serving as a plant growth regulators
    2.   Absorbing inorganic ions from soil
    3.   Helping the plant in utilizing atmospheric nitrogen
    4.   Protecting the plant from infection
17. Which of the following plant has a non-succulent xerophytic and thick leathery leaves with waxy coating?
    1.   Bryophyllum
    2.   Ruscus
    3.   Nerium
    4.   Calotropis
18. In a fresh water environment like pond, rooted autotrophs are
    1.   Nymphaea and typha
    2.   Ceratophyllum and Utricularia
    3.   Wolffia and pistia
    4.   Azolla and lemna
19. Match the following and choose the correct combination from the options given below:
    
    
    1.   i, ii, iii, iv and v
    2.   ii, iii, iv, v and i
    3.   iii, iv, v, i and ii
    4.   iv, iii, ii, v and i
20. Strong, sharp spines that get attached to animal’s feet are found in the fruits of
    1.   Argemone
    2.   Ecballium
    3.   Heraitier
    4.   Crossandra
21. Sticky glands of Boerhaavia and Cleome support
    1.   Anemochory
    2.   Zoochory
    3.   Autochory
    4.   Hydrochory

Samacheer Kalvi EM 12th Std Bio - Botany Unit 9 Chapter 6 MCQs Mock Test Instructions

Chapter 6: Principles of Ecology

Here you will find 21 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 6 to Chapter 7 and so on).
• The Prev Chapter Button on the Top and Bottom Navigates to the Prev Chapter (Example: From Chapter 6 to Chapter 5 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.