12th Standard Syllabus & Materials
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TN 12th Computer Applications மின்னணு தரவு பரிமாற்றம் Sample Question Papers Study Material - QB365 Set A
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TN 12th Computer Applications மின் - வணிக பாதுகாப்பு அமைப்புகள் Sample Question Papers Study Material - QB365 Set A
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TN 12th Computer Applications மின்னணு செலுத்தல் முறைகள் Sample Question Papers Study Material - QB365 Set A
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TN 12th Computer Applications மின் - வணிகம் Sample Question Papers Study Material - QB365 Set A
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TN 12th Computer Applications திறந்த மூல கருத்துருக்கள் Sample Question Papers Study Material - QB365 Set A
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Published on: 05/11/2020
12th Standard Botany - Ecosystem English Medium Free Online Test One Mark Questions with Answer Key 2020 - 2021
Download Tamil Nadu 12th Standard Biology question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.
Questions + Answers key
Take MCQ Biology Test1.
Which of the following is abundant in rock deposits and guano?
Nitrogen
Phosphorous
Oxygen
Calcium
2.
The upright pyramid is not a feature of _______
Pond ecosystem
Grassland ecosystem
Forest ecosystem
Terminal ecosystem
3.
Which of the following food chain is in improper sequence?
Plants ~ snake ~ rabbit ~ lizard ~ eagle
Plants ~ grasshopper ~ lizard ~ snake ~ hawk
Plants ~ lizard ~ rabbit ~ snake ~ eagle
Plants ~ rabbit ~ lizard ~ hawk ~ eagle
4.
Identify the incorrect statement
Carbon stored in oil is referred as Grey carbon
Carbon stored in atmosphere is referred as Blue carbon
Carbon stored in industrialized forests is referred as Green carbon
Carbon emitted from gas, died engine is referred as Black carbon
5.
Which is not a macro consumer?
Herbivore
Carnivore
Omnivore
Decomposer
6.
Identify the incorrect option among the following component sequence.
air, water, sunlight and temperature
latitude, altitude, direction of mountain and aptitude
soil air, pH of soil, saltwater and soil moisture
carbohydrate, protein, lipids and humic substances
7.
Significance of food web is / are ______.
it does not maintain stability in nature
it shows patterns of energy transfer
it explains species interaction
b and c
8.
Ecosystem consists of ____.
decomposers
producers
consumers
all of the above
9.
10.
Which of the following is / are not a natural ecosystem?
Forest ecosystem
Rice field
Grassland ecosystem
Desert ecosystem
1.
(b)
Phosphorous
2.
(a)
Pond ecosystem
3.
(b)
Plants ~ grasshopper ~ lizard ~ snake ~ hawk
4.
(c)
Carbon stored in industrialized forests is referred as Green carbon
5.
(d)
Decomposer
6.
(b)
latitude, altitude, direction of mountain and aptitude
7.
(d)
b and c
8.
(d)
all of the above
9.
(b)
10.
(b)
Rice field
12th Standard Syllabus & Materials
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TN 12th Computer Applications களப்பெயர் முறைமை (DNS) Sample Question Papers Study Material - QB365 Set A
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TN 12th Computer Applications கணினி வலையமைப்பு ஓர் அறிமுகம் Sample Question Papers Study Material - QB365 Set A
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Tamilnadu Stateboard 12th Standard Subjects
Maths
Chemistry
Physics
Biology
Computer Science
Business Maths and Statistics
Economics
Commerce
Accountancy
History
Computer Applications
Biology
Computer Technology
Computer Applications
Computer Science
Business Maths and Statistics
Commerce
Economics
Maths
Chemistry
Physics
Computer Technology
History
Accountancy
Tamil
English
French
Tamilnadu Stateboard Standards
