Class 12 Biology MCQ Chapter 14 Ecosystem

Class 12 Biology MCQ Chapter 14 Ecosystem Solutions English Medium to each chapter is provided in the list so that you can easily browse through different chapters Class 12 Biology MCQ Chapter 14 Ecosystem Question Answer in English and select need one. AHSEC Class 12 Biology Objective Type Question Answer As Per AHSEC New Book Syllabus Download PDF. AHSEC Biology MCQ Class 12 Solutions.

Class 12 Biology MCQ Chapter 14 Ecosystem

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Also, you can read the NCERT book online in these sections Solutions by Expert Teachers as per Central Board of Secondary Education (CBSE) Book guidelines. AHSEC Class 12 Biology Multiple Choice Solutions in English Medium are part of All Subject Solutions. Here we have given AHSEC Class 12 Biology MCQ Question Answer English Medium for All Chapters, You can practice these here.

Ecosystem

Chapter: 14

Choose the Correct Option:

1. What is the functional unit of nature where living organisms interact with their environment?

(i) Biosphere.

(ii) Community.

(iii) Population.

(iv) Ecosystem.

Ans: (iv)  Ecosystem.

2. Which of the following is a man-made ecosystem?

(i) Pond.

(ii) Aquarium.

(iii) Forest.

(iv) Wetland.

Ans: (ii) Aquarium.

3. Stratification refers to—

(i) Energy flow in the ecosystem.

(ii) Layered distribution of species.

(iii) Nutrient cycling.

(iv) Biomass productivity.

Ans: (ii) Layered distribution of species.

4. Which organism occupies the top vertical strata in a forest?

(i) Shrubs.

(ii) Herbs.

(iii) Trees.

(iv) Grasses.

Ans: (iii) Trees.

5. Which of the following is NOT one of the structural components of an ecosystem?

(i) Stratification.

(ii) Productivity.

(iii) Pollution.

(iv) Decomposition.

Ans: (iii) Pollution.

6. The primary source of energy in most ecosystems is—

(i) ATP.

(ii) Carbohydrates.

(iii) Sun.

(iv) Biomass.

Ans: (iii) Sun.

7. Gross Primary Productivity (GPP) is—

(i) Total biomass consumed.

(ii) Rate of organic matter formation during photosynthesis.

(iii) Biomass left after respiration.

(iv) Food energy in herbivores.

Ans: (ii) Rate of organic matter formation during photosynthesis.

8. Net Primary Productivity (NPP) is calculated by—

(i) GPP + Respiration.

(ii) Respiration – GPP.

(iii) GPP – Respiration.

(iv) None of the above.

Ans: (iii) GPP – Respiration.

9. Which factor does NOT affect primary productivity?

(i) Plant species.

(ii) Rainfall.

(iii) Earthquake.

(iv) Nutrient availability.

Ans: (iii) Earthquake.

10. Decomposition converts organic material into—

(i) Protein.

(ii) Lipid.

(iii) Inorganic substances.

(iv) Cellulose.

Ans: (iii) Inorganic substances.

11. The process of breaking detritus into small particles is—

(i) Leaching.

(ii) Catabolism.

(iii) Fragmentation.

(iv) Mineralisation.

Ans: (iii) Fragmentation.

12. Which climatic condition favors fast decomposition?

(i) Cold and dry.

(ii) Warm and moist.

(iii) Dry and hot.

(iv) Cool and wet.

Ans: (ii) Warm and moist.

13. Energy flow in an ecosystem is—

(i) Bidirectional.

(ii) Unidirectional.

(iii) Cyclic.

(iv) Random.

Ans: (ii) Unidirectional.

14. Producers in an aquatic ecosystem include—

(i) Zooplankton.

(ii) Algae and phytoplankton.

(iii) Fish.

(iv) Shrimp.

Ans: (ii) Algae and phytoplankton.

15. Which food chain starts with dead organic matter?

(i) Grazing.

(ii) Detritus.

(iii) Parasitic.

(iv) Aquatic.

Ans: (ii) Detritus.

Parimol

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