Biology - Questions (Section-1)
#Questions
1Movement of cell against concentration gradient is called
A. osmosisB. active transport
C. diffusion D. passive transport
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2Ordinary table salt is sodium chloride. What is baking soda?
A. Potassium chlorideB. Potassium carbonate
C. Potassium hydroxide D. Sodium bicarbonate
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3Ozone hole refers to
A. hole in ozone layerB. decrease in the ozone layer in troposphere
C. decrease in thickness of ozone layer in stratosphere D. increase in the thickness of ozone layer in troposphere
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4Pine, 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
A. angiospermsB. gymnosperms
C. monocotyledons D. dicotyledons
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5Plants receive their nutrients mainly from
A. chlorophyllB. atmosphere
C. light D. soil
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6Pollination is best defined as
A. transfer of pollen from anther to stigmaB. germination of pollen grains
C. growth of pollen tube in ovule D. visiting flowers by insects
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