Class 12 Biology Important Chapter 14 Ecosystem

Class 12 Biology Important Chapter 14 Ecosystem Solutions English Medium As Per The New Syllabus to each chapter is provided in the list so that you can easily browse through different chapters ASSEB Class 12 Biology Important Solutions in English and select need one. AHSEC Class 12 Biology Additional Notes Download PDF. HS 2nd Year Biology Additional Solutions.

Class 12 Biology Important Chapter 14 Ecosystem

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. ASSEB Class 12 Biology Additional Question Answer are part of All Subject Solutions. Here we have given HS 2nd Year Biology Important Solutions English Medium for All Chapters, You can practice these here.

Ecosystem

Chapter: 14

IMPORTANT QUESTION AND ANSWER

Answer the Following Question: 

1. What is an ecosystem?

Ans: An ecosystem is a functional unit of nature where living organisms interact with each other and with their physical environment.

2. What is stratification in an ecosystem?

Ans: Stratification is the vertical distribution of species at different layers in an ecosystem.

3. What is GPP?

Ans: Gross Primary Productivity (GPP) is the total rate of photosynthesis in a given area.

4. Name the five steps of decomposition.

Ans: Fragmentation, Leaching, Catabolism, Humification, Mineralisation.

5. Which ecological pyramid can never be inverted?

Ans: Pyramid of energy.

6. Why are decomposers not included in ecological pyramids?

Ans: Because they operate at all trophic levels and are not part of a single linear chain.

7. What is the significance of detritus food chain in a terrestrial ecosystem?

Ans: (i) It helps in recycling of nutrients.

(ii) Decomposers convert dead organic matter into inorganic substances.

(iii) It supports detritivores and links with grazing food chain through omnivores.

8. What is the role of decomposers in nutrient cycling?

Ans: (i) They break down dead organisms.

(ii) Release nutrients like nitrogen, phosphorus back into the soil.

(iii) Help in mineralisation and soil fertility.

9. What is humification and why is it important?

Ans: (i) Humification is the process of forming humus.

(ii) Humus improves soil structure and acts as a long-term nutrient reservoir.

10. What are the limitations of ecological pyramids?

Ans: (i) Do not include organisms feeding at multiple trophic levels.

(ii) Do not consider the role of decomposers.

(iii) Assume a single food chain, not food webs.

(iv) Biomass pyramids may be inverted in aquatic systems.

11. Why is the pyramid of energy always upright?

Ans: (i) Energy is lost as heat at each trophic level due to respiration.

(ii) Only 10% of energy is passed to the next level.

iii) Energy flow is unidirectional and non-cyclic.

(iv) Thus, energy decreases at higher trophic levels, making the pyramid upright.