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Biology 2nd year chapter 25 important Questions

Learn Biology 2nd year chapter 25 important Questions from past papers of Punjab boards. These important Biology 2nd year mcqs, short and long questions are collected by going through different past papers of all Punjab Board Pakistan.

Biology 2nd year chapter 25


Why are these questions important?

These Questions are taken from past papers of Biology 2nd year 12. These questions are top repeated of in previous papers of Biology 2nd year of all Punjab boards as;

*      Bahawalpur Board

*      D.G.Khan Board

*      Faisalabad Board

*      Gujranwala Board

*      Lahore Board

*      Multan Board

*      Rawalpindi Board

Content is created and designed with intense care and diligence. Here is only the most important MCQ, short questions and long questions of Biology 2nd year chapter 25 Ecosystem.

PDF Download and Print Available

You can easily download in pdf format or view Biology 12 chapter mcqs, short questions and long questions  online. You can easily print these files in simple way. Here you find Biology 2nd year chapter 25 Ecosystem important mcqs, short and long questions. By Preparing these important questions, you will achieve splendid marks in Biology 12. This content is very helpful for weak students and also helpful for those students that are better at Biology 2nd year exam preparation. These Questions are based on the current Biology 2nd year syllabus according to Punjab Textbook Board.

2nd year bio chapter 25


Great Achievement in Short Time

Generally, students get less time for preparation. If we talk about Biology 2nd year, we need a lot of intensive time to prepare for it. 2nd Year students of face big difficulty while preparation of Biology MCQs, Short & Long questions. Good News! mhbeducator.com offers you, the easiest and smartest way to prepare Biology Class 12 by which students can save their time and will able to prepare Class 12 Biology very fast. Here your are provided Biology 2nd year chapter 25 Ecosystem MCQs, important short and long questions. For other chapters click the link below the Post. These Questions are based on the current Biology 12 syllabus according to Punjab Textbook Board.

About This Chapter

chapter 25 Ecosystem of  Biology 2nd year enables the students to learn Basics of ecosystem and components of ecosystem. Students learn about succession and types of succession; primary succession and secondary succession. Students learn Biogeochemical Cycles as; carbon cycle and nitrogen cycle. This Post "Biology 2nd year chapter 25 important Questions" covers all important mcqs, short and long questions related to important  topics of this chapter.

👉Imp MCQs - Biology Class 12 CH # 25

1. An association b/w a fungus and alga is:

(A) Mycorrhizae
(B) Lichens
(C) Commensalism
(D) Parasitism

(B) Lichens


2. Major regional ecological community of plants and animals form     

(A) Biosphere
(B) Biomass
(C) Niche
(D) Biomes

(C) Niche


3. Succession ends with a diverse and relatively stable      

(A) Climax community
(B) Xerosere
(C) Hydrosere
(D) All of above

(A) Climax community


4. The basic functional unit of ecology is 
    
(A) Ecosystem
(B) Niche
(C) Phyletic Lineage
(D) Biome

(A) Ecosystem


5. Diseases in living organisms caused by parasites are :

(A) Infections
(B) Infestation
(C) Disinfestation
(D) All of above

(B) Infestation


6. Succession starts on dry soil is called as?

(A) Xerosere
(B) Hydrosere
(C) Derosere
(D) None of these

(A) Xerosere


7. Study of single population’s relationship to its environment is :

(A) Autecology
(B) Synecology
(C) Morphology
(D) Parasitology

(A) Autecology


8. Distinct levels of food chain are called ? 

(A) Trophic levels
(B) Pyramids
(C) Food web
(D) Food links

(A) Trophic levels



9. Which one of the following is foliage lichen :

(A) Polytrichum
(B) Dermatocapon
(C) Tortula
(D) All of above

(B) Dermatocapon


10. The actual location of place where an organism lives:

(A) Niche
(B) Environment
(C) Habitat
(D) All of above

(C) Habitat

👉Next, there is  PDF containing Biology class 12 chapter 25 important Short and Long Questions covers all important topics of this chapter.



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👉Other Chapters (PDF) of Biology Class 12 Punjab Textbook Board

Chapter 15
Chapter 16
Chapter 17
Chapter 18
Chapter 19
Chapter 20
Chapter 21
Chapter 22
Chapter 23
Chapter 24
Chapter 26
Chapter 27

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