General Science Class 6th MCQs=745

• 5^th June is celebrated as a world environment day.
• Component of environment is two (a) Biotic component  (b) A biotic component
• The living things are called the biotic components.
• The non-living things are called abiotic components.
• Biotic (living) component:     
  
• a) Producer      b) Herbivores      c) Carnivores         d) Omnivores          e)  Decomposer
• A biotic (non-living) components:
  
• a) Sun light      b) Temperature   c) Rainfall              d) Water                  e) Soil             
• The plants are the producers.             The animals are consumers (صارف کنندہ).
• There are two types of environment   
• a)                  Terrestrial    (خاکی  ):    Example: grass land, forest, deserts, lands)
• b)                  Aquatic            (آبی):    Example: pond (جوہڑ), river, marine)
• Decomposition rate of land is fast from deserts.
• Annual rainfall is less than 250mm is the world everywhere deserts.
• The soil is rich in decomposed material and the rate of decomposition is fast.
• The rate of decomposition of plants and animals is low in deserts.
• Predation (شکاری خور): It is the relationship between two animals in which one kills and feeds on the other.  Like cat----Rat, Sparrow----insect etc.
• Parasitism: One organism (parasite …مفت خور) feed on another organism (the host) by living on or in its body. Like Mosquitos-----Human
• Mutualism: It is the relationship between two organisms in which both are benefitted and none of them is harmed. Some type of bacteria lives in the intestine of human being.

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Identify the abiotic component in the following
a) Lion                        
b) Apple         
c) Water vapor          
d) Beetle

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The relationship between two organisms where both are benefited neither is harmed is called…
a) Predation                
b) Parasitism   
c) Mutualism              
d) none of these

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Thar is an example of …………Environment.
a) Desert                    
b) Aquatic
c) Grassland                
d) none of these

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Mosquito feeding on human blood is an example of……….
a) Predation                
b) Parasitism  
c) Mutualism               
d) none of these

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Lichens are a mutualism formed between fungi and various groups of……….
a) Amoeba                  
b) Lichens       
c) Fungi                      
d) Algae

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