Raghu used excessive chemical fertilisers in his field while Raman found the soil of his field to be basic in nature. What should they add to their fields to improve the quality of the soil?
A Raghu : Organic matter Raman : Quick lime
B Raghu : Quick lime Raman : Organic matter
C Both should add quick lime.
D Both should add organic matter.
What are the adaptations for flight in birds?
(i) Hollow bones to reduce body mass.
(ii) Feathers covering their body.
(iii) A streamlined body with powerful tail.
(iv) Wings with powerful muscles.
A (i) only
B (i), (ii) and (iii) only
C (i), (ii) and (iv) only
D (i), (ii), (iii) and (iv)
The given picture shows foot of a bird. Which of the birds given below can have this type of foot?
Select the option that correctly fills the blank in the given statement.
Fill in the blanks with most appropriate option.
Although a number of objects, such as kites, birds, aeroplanes move in space, but their shadow is not seen on the earth. This is due to the reason that the (i), the region of complete (ii) is not able to reach the earth. The region of partial (iii), that is the (iv) reaching the earth is too large and too faint to be visible to us.
Refer to the given flow chart and select the INCORRECT option regarding it.
A There is no such food item as R.
B Q can be a white coloured energy giving food which is staple food of West Bengal.
C P can be any of the egg, meat or chicken.
D None of these
what about milk then?
A particle is moving in a straight line with initial velocity u and uniform acceleration a. If the sum of the distances travelled in tth and (t + 1)th seconds is 100 cm, then its velocity after t seconds in cm s-1 is