2nd Year Biology Chapter 25 Notes

Complete handwritten Chapter No.25: 2nd Year Biology Chapter 25 Notes written by Professor Professor Mr. Adnan Haider. These notes are very helpful in the preparation of Ecosystem of Biology for the students of the intermediate and these are according to the paper patterns of all Punjab boards.

Summary and Contents:
Topics which are discussed in the notes are given below:
  • Important 2nd Year Biology Chapter 25 mcqs for Intermediate part-II students.
  • 1. Lichen is symbiotic association between a fungus and:  (A) Diatom  (B) Angiosperms  (C) Gymnosperms  (D) An Alga
  • 2. The symbiotic relationship between insect and flowering plants is the example of:  (A) Parasitism  (B) Predation  (C) Commensalism  (D) Mutualism
  • 3. Lichens are an example of:  (A) Parasitism  (B) Predation  (C) Mutualism  (D) Commensalism
  • Important 2nd Year Biology Chapter 25 important short questions for Intermediate part-II students.
  • 4. The study of relationship of an organism to their environment is knows as:  (A) Ecology  (B) Biology  (C) Zoology  (D) Mycology
  • 5. Similar group of individuals who can inter breed and produce organisms of their own kind forms a:  (A) Population  (B) Community  (C) Succession  (D) Species
  • 6. When living and non - living interact to produce a stable system in which exchange of material with flow of energy takes place , it forms a / an:  (A) Environment  (B) Ecosystem  (C) Stable community  (D) Ecological succession
  • Important 2nd Year Biology Chapter 25 important questions for Intermediate part-II students.
  • 7. The living organism which prepare their own food are:  (A) Producers  (B) Predators  (C) Parasites  (D) Prey 
  • 8. Who defined the niche as the species occupation?  (A) Sutton  (B) Cuvier  (C) Charles Eton  (D) Charles Layll
  • 9. The living organisms, which cannot prepare their own food but obtain readymade food from others are:  (A) Primary and secondary consumers  (B) Consumers  (C) Only primary consumer  (D) Secondary and tertiary consumers
  • Important 2nd Year Biology Chapter 25 short questions for Intermediate part-II students.
  • 10. A group of inter breeding individuals, belonging to same species and sharing a common geographic area, is called: (A) Population  (B) Community  (C) Biome  (D) Ecosystem
  • 11. Who proposed the term niche in ecology?  (A) Haeckel  (B) Darwin  (C) Joseph Grinnel  (D) Charles Eton
  • 12. All living organisms of the planet earth are collectively called:  (A) Atmosphere  (B) Hydrosphere  (C) Lithosphere  (D) Biosphere
  • Important 2nd Year Biology Chapter 25 important long questions for Intermediate part-II students.
  • 13. The actual location of place where an organism lives is called:  (A) Habitat  (B) Niche  (C) Environment  (D) Ecosystem
  • 14. Biosphere is spread out over the surface of planet earth extending about:  (A) 8 - 10 km  (B) 3 - 6 km  (C) 4 – 8 km  (D) 8 - 12 km
  • 15. Biome is a large:  (A) Simple community  (B) Regional community  (C) Complex community  (D) Climax community
  • Important Chapter 25 Biology 2nd Year notes for Intermediate part-II students.
  • What are the biochemical cycles?  Define grazing.
  • What percentage of sun energy reaches to plants?
  • What is autecology?  Define synecology.
  • Differentiate between the food chain and the food web?
  • Differentiate between pioneer and climax community?
  • What do you mean by seral community?
  • Differentiate between primary and secondary succession?
  • How a predator is related to its prey?
  • How nitrogen is lost is the atmosphere?
  • Differentiate between gross primary production and net primary production.
  • What type of food chain better supports a community? And why?
  • Why the process of assimilation is called the reverse of nitrification?
  • Define ecology.  Define ecosystem and Eco-components. 
  • What is community? What is a biome? How many biomes are present?
  • What is an ecological niche?
  • Differentiate between autecology and synecology?
  • Define succession.
  • Name subdivision of biotic and abiotic components.
  • Explain association of organism in lichen and mycorrhiza.
  • What is the nitrogen cycle?
  • What is infestation?
  • Define biogenic elements.
  • What are the advantages and disadvantages of grazing?
  • What are the function of nitrosomonas and nitrobacter?
  • Define denitrification.
  • Define Habitat. Differentiate between hydrosere and xerosere.
  • How grazers affect the texture of the soil?
  • Write the significance of root nodules in plants.
  • Important long question of Biology 2nd year chapter 25

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