2nd Year Biology Chapter 1 Notes

Important Complete 2nd Year Biology Chapter 1 Notes written by Professor Mr. Adnan Haider Suib. These notes are very helpful in the preparation of 2nd Year Biology Chapter 1 Notes 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 1 mcqs for Intermediate part-II students.
  • 1. The protection of internal environment form the harms of the fluctuations in external environment are termed as:  (A) Osmoregulation  (B) Thermoregulation  (C) Excretion  (D) Homeostasis
  • Important mcqs of biology 2nd year chapter 1 for Intermediate part-II students.
  • 2. Extracellular environment may be of diluted solution compared to the cell concentration thus designated as:  (A) Isotonic  (B) Hypertonic  (C) Hypotonic  (D) Cotonic
  • 3. The more concentrated external environment is termed as:  (A) Hypotonic  (B) Hypertonic  (C) Isotonic  (D) Peritonic
  • Important 2nd Year Biology Chapter 1 important questions for Intermediate part-II students.
  • 4. In urea cycle , the detoxified form of ammonia is:  (A) Urea  (B) Ammonium ions  (C) Uric acid  (D) Nitrates
  • 5. Those plants which have moderate water availability are called?  (A) Hydrophytes  (B) Mesophytes  (C) Xerophytes  (D) Saprophytes
  • Important 2nd Year Biology Chapter 15 mcqs for Intermediate part-II students.
  • 6. The mesophyte plant is:  (A) Cacti  (B) Hydrilla  (C) Brassica  (D) Kikar
  • Important 2nd Year Biology Chapter 1 homeostasis pdf for Intermediate part-II students.
  • 7. Hydrophytes posses:  (A) Small leaves  (B) Large leaves  (C) Less water  (D) stomata on lower surface of leaves
  • 8. The stomata are located on the upper surface only in:  (A) Xerophytes  (B) Hydrophytes  (C) Mesophytes  (D) Epiphytes
  • Important 2nd Year Biology Chapter 1 important short questions for Intermediate part-II students.
  • 9. The plants that have adaptation of small and thick leaves to reduce water loss are called?  (A) Hydrophytes  (B) Mesophytes  (C) Xerophytes  (D) Hygrophytes
  • 10. Which one is not a mesophyte?  (A) Brassica  (B) Rose  (C) Mango  (D) Cacti
  • Important 2nd Year Biology Chapter 1 important long questions for Intermediate part-II students.
  • 11. The category of plants that has adaptation of small and thick leaves to limit water loss is called?  (A) Hydrophytes  (B) Xerophytes  (C) Mesophytes  (D) Halophytes
  • 12. Fresh water protozoans pump out excess water by:  (A) Food vacoule  (B) Pinocytosis  (C) Contractil vacuole  (D) Exocytosis
  • Important 2nd Year Biology Chapter 1 short questions for Intermediate part-II students.
  • 13. Anhydrobiosis refers to tolerate:  (A) Dehydration  (B) Hydration  (C) Anhydration  (D) Rehydration
  • 14. Animals that do not require adjusting their internal osmotic state actively are known as:  (A) Osmoregulators  (B) Osmocoformers  (C) Terrestrial  (D) Hypertonic
  • Important 2nd Year Biology Chapter 1 homeostasis mcqs for Intermediate part-II students.
  • 15. Trirmethylamine Oxide is produced in:  (A) Hag fish  (B) Bony fish  (C) Marine fish  (D) Cartilaginous fish
  • What do you know about homeostasis?  The protection of internal environment from the harms of fluctuations in external environment is termed as homeostasis.
  • Important 2nd Year Biology Chapter 1 homeostasis notes for Intermediate part-II students.
  • Define osmoregulation?  The mechanism of regulation, generally between organism and its environment, of solute and the gain and the loss of water is osmoregulation. OR It is the regulation of water ans solutes between organisms and their environment.
  • Important 2nd Year Biology Chapter 1 homeostasis short questions for Intermediate part-II students.
  • What is ebony?  It is a tree that deposits strange chemicals in branches and trunk, especially in old xylem, which is no longer used for water transport. Ebony produces very black wood in the center.
  • Important 2nd Year Biology Chapter 1 homeostasis Long questions for Intermediate part-II students.
  • What is haemodialysis?  In haemodialysis blood is circulated through a dialyzer called an artificial kidney.  Dialyzer has two spaces separated by thin membrane. Blood passes from one side of the membrane and dialysis fluid in the other. The wastes and excess water pass from the blood through the membrane into the dialysis fluid.   
  • Important 2nd Year Biology 1st chapter mcqs for Intermediate part-II students.
  • What are heterotherms?  Hetero-therms is of those animals that are capable of varying degrees of endothermic heat production but generally do not regulate their body temperature within the narrow range e.g. bats, humming bird etc.
  • Important 2nd Year Biology 1st chapter important questions for Intermediate part-II students.
  • Define thermoregulation.  The maintenance of internal temperature within a tolerable range is designated as thermoregulation.
  • Important 2nd Year Biology Chapter 15 Notes for Intermediate part-II students.
  • Mention two metabolic altered states that generally cause kidney stone formation.
  • What is renal failure?
  • Important 2nd Year Biology Chapter 15 important short questions for Intermediate part-II students.
  •  Account for one main adaptation in plants to high and low temperature.
  • Important 2nd year biology chapter 15 short questions for Intermediate part-II students.
  • How do the ascending and descending loops of Henle differ in their physiology yet contribute to sustaining a high concentration of kidney interstitium?
  • Important 2nd Year Biology Chapter 15 important Long questions for Intermediate part-II students.

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