12th Standard Syllabus & Materials
12th Standard
TN 12th Computer Applications மின்னணு தரவு பரிமாற்றம் Sample Question Papers Study Material - QB365 Set A
NEW12th Standard
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
NEW12th Standard
TN 12th Computer Applications திறந்த மூல கருத்துருக்கள் Sample Question Papers Study Material - QB365 Set A
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TN 12th Computer Applications வலையமைப்பு வடமிடல் Sample Question Papers Study Material - QB365 Set A
Published on: 05/11/2020
12th Standard Botany - Ecosystem English Medium Free Online Test One Mark Questions 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.
Lotic ecosystem refers to________
Open water ecosystem
Running water ecosystem
Standing water ecosystem
Ocean water ecosystem
2.
Complete the food chain by filling the link X:
Paddy ~ Grasshopper ~ Frog ~ X ~ Hawk
King cobra
Gorilla
Rabbit
Tasmanian wolf
3.
The type of ecosystem with maximum net primary productivity is________
Desert ecosystem
Deciduous forest ecosystem
Tropical rain forest ecosystem
Grassland ecosystem
4.
Which one of the following is not a functional unit of an ecosystem?
Productivity
Stratification
Energy flow
Decomposition
5.
If 1200 Joules of solar energy is trapped by producers, how much of Joules of energy does the organism in the third trophic level will receive?
120 Joules
12 Joules
1.2 Joules
0.12 Joules
6.
Which group of organism occupies the third tropic level in an ecosystem?
Primary consumers
Secondary consumers
Secondary carnivores
Omnivores
7.
Which of the following is not a sedimentary cycle
Nitrogen cycle
Phosphorous cycle
Sulphur cycle
Calcium cycle
8.
The following diagram represents
pyramid of number in a grassland ecosystem
pyramid of number in a pond ecosystem
pyramid of number in a forest ecosystem
pyramid of biomass in a pond ecosystem
9.
Pond is a type of ______.
forest ecosystem
grassland ecosystem
marine ecosystem
fresh water ecosystem
10.
Which of the following is not a abiotic component of the ecosystem?
Bacteria
Humus
Organic compounds
Inorganic compounds
1.
(b)
Running water ecosystem
2.
(a)
King cobra
3.
(c)
Tropical rain forest ecosystem
4.
(b)
Stratification
5.
(c)
1.2 Joules
6.
(b)
Secondary consumers
7.
(a)
Nitrogen cycle
8.
(c)
pyramid of number in a forest ecosystem
9.
(d)
fresh water ecosystem
10.
(a)
Bacteria
12th Standard Syllabus & Materials
12th Standard
TN 12th Computer Applications களப்பெயர் முறைமை (DNS) Sample Question Papers Study Material - QB365 Set A
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TN 12th Computer Applications வலையமைப்பு எடுத்துக்காட்டுகள் மற்றும் நெறிமுறைகள் Sample Question Papers Study Material - QB365 Set A
NEW12th Standard
TN 12th Computer Applications கணினி வலையமைப்பு ஓர் அறிமுகம் Sample Question Papers Study Material - QB365 Set A
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TN 12th Computer Applications PHP-உடன் MySQL-ஐ இணைத்தல் Sample Question Papers Study Material - QB365 Set A
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
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