12th Bio Botany one marks – Lesson 6 – Online Test | Principles of Ecology

12th Bio Botany one marks – Lesson 6 – Online Test | Principles of Ecology

12th Bio Botany one marks – Lesson 6 – Online Test | Principles of Ecology Click Here Biology Full Online Test Both Bio Botany and Bio zoology.

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• 12th Bio Botany one marks – Lesson 8 – Online Test | Environmental Issues

  2022-11-27

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#1. Which of the following is not a abiotic component of the ecosystem?

Bacteria

Bacteria

Humus

Humus

Organic compounds

Organic compounds

Inorganic compounds

Inorganic compounds

#2. Which of the following is / are not a natural ecosystem?

Forest ecosystem

Forest ecosystem

Rice field

Rice field

Grassland ecosystem

Grassland ecosystem

Desert ecosystem Pond is a type

Desert ecosystem Pond is a type

#3. Pond is a type of __________

Forest ecosystem

Forest ecosystem

grassland ecosystem

grassland ecosystem

marine ecosystem

marine ecosystem

fresh water ecosystem Pond ecosystem

fresh water ecosystem Pond ecosystem

#4. Profundal zone is predominated by heterotrophs in a pond ecosystem, because of __________

with effective light penetration

with effective light penetration

no effective light penetration

no effective light penetration

complete absence of light

complete absence of light

a and b

a and b

#5. Solar energy used by green plants for photosynthesis is only __________

2 -8%

2 -8%

2-10%

2-10%

3-10%

3-10%

2-9%

2-9%

#6. Which of the following ecosystem has the highest primary productivity?

Pond ecosystem

Pond ecosystem

Lake ecosystem

Lake ecosystem

Grassland ecosystem

Grassland ecosystem

Forest ecosystem

Forest ecosystem

#7. Ecosystem consists of __________

decomposers

decomposers

producers

producers

consumers

consumers

all of the above

all of the above

#8. Which one is in descending order of a food chain?

Producers → Secondary consumers → Primary consumers → Tertiary consumers

Producers → Secondary consumers → Primary consumers → Tertiary consumers

Tertiary consumers → Primary consumers → Secondary consumers → Producers

Tertiary consumers → Primary consumers → Secondary consumers → Producers

Tertiary consumers → Secondary consumers → Primary consumers → Producers

Tertiary consumers → Secondary consumers → Primary consumers → Producers

Tertiary consumers → Producers → Primary consumers → Secondary consumers Significance of food web is / are

Tertiary consumers → Producers → Primary consumers → Secondary consumers Significance of food web is / are

#9. Significance of food web is / are __________

it does not maintain stability in nature

it does not maintain stability in nature

it shows patterns of energy transfer

it shows patterns of energy transfer

it explains species interaction

it explains species interaction

b and c

b and c

#10. Which of the following is / are not the mechanism of decomposition?

Eluviation

Eluviation

Catabolism

Catabolism

Anabolism

Anabolism

Fragmentation

Fragmentation

#11. Which of the following is not a sedimentary cycle?

Nitrogen cycle

Nitrogen cycle

Phosphorous cycle

Phosphorous cycle

Sulphur cycle

Sulphur cycle

Calcium cycle

Calcium cycle

#12. Which of the following are not regulating services of ecosystem services? (i) Genetic resources (ii) Recreation and aesthetic values (iii) Invasion resistance (iv) Climatic regulation

i and iii

i and iii

ii and iv

ii and iv

i and ii

i and ii

i and iv

i and iv

#13. Ecosystem is the structural and functional unit of ecology. This statement was given by ___________

Tansley

Tansley

Odum

Odum

Charles Elton

Charles Elton

Edwin

Edwin

#14. Pick out the edaphic factor among the following.

Rainfall

Rainfall

Temperature

Temperature

Soil pH

Soil pH

Latitude

Latitude

#15. Which is not a macro consumer?

Herbivore

Herbivore

Carnivore

Carnivore

Ominivore

Ominivore

Decomposer

Decomposer

Finish