Trees have neither nose nor nostrils. How does the exchange of gases occur in u7plants?

How does the exchange of air take place in plants?

How does chemical coordination occur in plants?

How does gaseous exchange occur in lungs ?

How does ascent of sap occur in tall trees ?

How does Phototropism occur in plants?

How does Phototropism occur in plants?

An organic compound (A) with molecular formula C_(8)H_(8)O forms an orange-red precipitate with 2,4-DNP reagent and gives yellow precipitate on heating with iodine in the presence of sodium hydroxide. It neither reduces Tollens’ or Fehlings’ reagent, nor does it decolourise bromine water or Baeyer’s reagent. On drastic oxidation with chromic acid, it gives a carboxylic acid (B) having molecular formula C_(7)H_(6)O_(2) . Identify the compounds (A) and (B) and explain the reactions involved.

Observe a lawn in your area (If you have one) and see how it is maintained. Find out from the gardener the different types of plants that he removes from time to time. Do you think a farmer does the same thing on his farm ?