Enzyme secreted by stomach digests the food but stomach is not digested by this digestive juice because
A. Wall of stomach is lined with mucus
B. This is made up of hard cells
C. It is made up of steel
D. None of the above
Answer: Option A
A. Wall of stomach is lined with mucus
B. This is made up of hard cells
C. It is made up of steel
D. None of the above
Answer: Option A
Ordinary table salt is sodium chloride. What is baking soda?
A. Potassium chloride
B. Potassium carbonate
C. Potassium hydroxide
D. Sodium bicarbonate
A. hole in ozone layer
B. 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
A. angiosperms
B. gymnosperms
C. monocotyledons
D. dicotyledons
Pollination is best defined as
A. transfer of pollen from anther to stigma
B. germination of pollen grains
C. growth of pollen tube in ovule
D. visiting flowers by insects
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