43. DESCHIDE brely how nutrients are replenished in the soil row is the growing only
the fields beneficial to the farmer ?
44. (a) A person observes that some plants have deep red, violet and brown coloured leaves. Can these leaves
carry out photosynthesis ? Give reason for your answer.
(b) Describe the importance of photosynthesis for the existence of life on the earth.
Answers
43.We can replenished the nutrients in the soil by adding manures and fertilizers to the soil. we cal also grow the leguminous plants in the field to replenish the nitrogen in the soil. If you want to replenish the soil without adding any manure or fertilizers you can use the crop rotation pattern. in this the plants will use only the needed nutrients and after that you can grow any other crop so that the nutrients had been used could be replenished.
44.A) yes, these leaves also can carry out photosynthesis because the green colour of the leaves is hiding there is a mass outside the leaves which is called plastids .
44.B) The process of photosynthesis is very useful for the existence of life on earth without this process plants cannot be able to make their own food and without food the plants will die. And we know that plants give us oxygen so without oxygen all living beings will die.
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