2nd Year Biology Chapter 27 Notes

• Important 2nd Year Biology Chapter 27 mcqs for Intermediate part-II students.
• 1. Batteries store which type of energy:  (A) Electrical  (B) Mechanical  (C) Nuclear  (D) Chemical
• 2. Population of Pakistan in the year 1947 was:  (A) 180 million  (B) 150 million  (C) 50 million  (D) 32.5 million
• 3. Study of Human Populations and the things that affect them, is called:  (A) Human Biology  (B) Sociobiology  (C) Demography  (D) Teratology
• 4. The world population is expected to be nearly doubled by:  (A) 2040  (B) 2020  (C) 2030  (D) 2050
• Important 2nd Year Biology Chapter 27 short questions for Intermediate part-II students.
• 5. The increase of environment temperature due to high amount of CO is known as:  (A) Stone cancer  (B) Ozone depletion  (C) Acid rains  (D) Global warming
• 6. The steady internal state of homeostasis is known as:  (A) Normal Health  (B) Disorder  (C) Disease  (D) Abnormal Health
• 7. In pure form , Ozone is:  (A) Bluish  (B) Greenish  (C) Yellowish  (D) Reddis
• 8. A chemical that kills weed plants is called:  (A) Pesticide  (B) Fungicide  (C) Herbicide  (D) Insecticide
• 9. Beri Beri is caused by:  (A) Infection  (B) Nutritional Deficiency  (C) hysical disorder  (D) Chemical Cause
• Important 2nd Year Biology Chapter 27 long questions for Intermediate part-II students.
• 10. Energy from sun flows through as ecosystem in the form of:  (A) Radiant heat  (B) Light  (C) Temperauter  (D) Evaporation
• 11. If the population is above the carrying capacity what must happen:  (A) It must eventually decline  (B) It can remain stable  (C) It must immediately cure  (D) It can continue to increase
• important long questions of biology 2nd year chapter 27 for Intermediate part-II students.

• What is Ozone layer? 
• What do you mean by non-renewable resources?
• What is the difference between deforestation and afforestation?
• What do you know about biodiversity?
• What is water pollution?
• Define greenhouse effect.
• What is acid rain? 
• What is algal bloom? Differentiate between renewable and non-renewable sources?
• Why trees are called environmental buffers?
• What is the advantages and disadvantages of fossil fuels?
• Why wild life is some time also included in non-renewable resources
• How does tidal barrage generate electricity?
• What is stone cancer? Give its cause. 
• Important  chapter 27 biology 2nd year for Intermediate part-II students.
• How balance in the nutrient cycle can be upset?
• What is an environment? What is a composition of air?
• In which sources of energy are classified?
• Why fossil fuels are called so? 
• What is hydroelectric power?
• Where geothermal power plants are working?
• What is geothermal energy?
• What is the use of solid wastes?
• What is the disadvantage of nuclear energy?
• Define demography.
• What are the consequences of population increase? 
• What is environmental pollution?
• What are pollutants?
• What are the features of ozone in pure form?
  
• What are the effects of ozone layer depletion on life of Earth? 
• What is ozone depletion? What is the cause of ozone depletion?
• What are the causes of the greenhouse effect?
• What are greenhouse gases?
• What is ocean thermal gradient? Give its importance.
• What are the sources of air pollution?
• What are the major sources of CO? Give its health effect.
• What is the leading cause of deforestation?
• What are the main causes of water pollution?
• Why there is a need for protection and conservation of the environment?
• What is eutrophication? What is wildlife?
•  What are fertilizers?     and    What is a pesticide?
• What are pathogenic diseases?  Give at least two ways to conserve energy.
• What is erosion?   Define soil.
• What do you mean by effluents?
• Write the reason for world population explosion.
• Important short question of Biology 2nd year chapter 27