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Biology MCQ Questions And Answers

  1. Ordinary table salt is sodium chloride. What is baking soda?

 

Potassium chloride

Potassium carbonate

Potassium hydroxide

Sodium bicarbonate

 

 

 


  1. Ozone hole refers to

 

hole in ozone layer

decrease in the ozone layer in troposphere

decrease in thickness of ozone layer in stratosphere

increase in the thickness of ozone layer in troposphere

 

 

 


  1. Pine, fir, spruce, cedar, larch and cypress are the famous timber-yielding plants of which several also occur widely in the hilly regions of India. All these belong to

 

angiosperms

gymnosperms

monocotyledons

dicotyledons

 

 

 

 


  1. Pollination is best defined as

 

transfer of pollen from anther to stigma

germination of pollen grains

growth of pollen tube in ovule

visiting flowers by insects

 

 

 


  1. Plants receive their nutrients mainly from

 

chlorophyll

atmosphere

light

soil

 

 

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