MDCAT Biology Chapter 8 MCQ's Test With Answers

MDCAT Biology Chapter 8 MCQ's Test

Sr. # Questions Answers Choice
1 We are reducing natural 'carbon dioxide's Sources Sinks Both None
2 Chlorofluorocarbons are Organic Inorganic Intermediate Solid
3 Which oxides causes headache and brain damage Nitrogen Lead CO<sub>2</sub> CO
4 How plants are deprived of nutrients by acid rain Due to teaching Due to fall in pH Acid creates a barrier to absorption Unknown cause
5 What is cause of Eutrophication Excreta Phosphate Nitrates All
6 Green house effect, acid rain headaches and coughs are related to which of the followings? Oxides of nitrogen Oxides of sulphur CO CFCs
7 Some ______ years ago human population and conversion of land to agricultural production began 10,000 40,000 5000 None
8 One atom of chlorine can destroy up to ___________ ozone molecules? One million One billion One thousand Two million
9 Which of these diseases is not infectious? Measles Influenza Pneumonia Tetany
10 Air conditioners are the source of Effluents SO<sub>2</sub>,NO<sub>2</sub> Heavy metals CFCs
11 Which element is the most potent source for the depletion of ozone layer Chlorine Fluorine Carbon All of them
12 Global warming is the result of Ozone layer depletion Acid rain Green house gases All of them
13 Oxides of nitrogen are produced by burning of Carbonate Leaded patrol Fossil fuels All of above
14 Population of Pakistan was ________ in 1947 23.5 million 30 million 32.5 million 40 million
15 Topography is study of? Population Individula Earth birds
16 The deficiency of which one of the following is cause of goiter Iodine Calcium Potassium Iron
17 Aerosol spray foams are potential sources of Carbon monoxide Sulphur dioxide Chlorofluorocarbons (CFCs) Lead compounds
18 Man depends foams are potential sources of Carbon monoxide Sulphur dioxide Chlorofluorocarbons (CFCs) Lead compounds
19 Dams and canal networks developed for irrigation purpose in Pakistan and many other countries create the problems of Salinity and soil erosion Salinity and water logging Soil depletion and water erosion Soil erosion and depletion
20 Excessive ploughing of lands in arid regions results in the development of Forest Deserts Grassland Fields
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