Q24 of 50 Page 1

Why are beehives kept in crop field during flowering period ? Name any two crop fields where this is practiced.

• Beehives kept in a crop field during flowering period because bee collect the nector from flowers while transfer the pollen grains and thus enhance the pollination of crop and this increases the crop yield.


• Bee collect the nector from the plant and collect it in beehive so it helps in honey collection. This increases honey production.


• This technique is practised in apple and watermelon fields.


More from this chapter

All 50 →
22

Women are often blamed for producing female children. Consequently, they are ill treated and ostracized. How will you address this issue scientifically if you were to conduct an awareness programe to highlight the values involved?

 23

(a) Name the tropical sugar cane variety grown in South India. How has it helped in improving the sugar cane quality grown in North India ?

(b) Identify ‘a’, ‘b’ and ‘c’ in the following table:



 25

How did the process of RNA interference help to control the nematode from infecting roots of tobacco plants? Explain.

 26

Study the graph given below and answer the questions that follow :


(i) Write the status of food and space in the curves (a) and (b).


(ii) In the absence of predators, which one of the two curves would appropriately depict the prey population?


(iii) Time has been shown on X-axis and there is a parallel dotted line above it. Give the significance of this dotted line.