| 41. | Khaira disease or miniature disease of paddy is caused by the deficiency of which element? |
A. such as | |
B. copper | |
C. calcium | |
D. magnesium |
| 42. | Whiptail disease of cauliflower is caused by the deficiency of which element? |
A. Zn | |
B. Moh | |
C. Cu | |
D. mg |
| 43. | Deficiency of which causes chlorosis of leaves? |
A. Can | |
B. mg | |
C. Moh | |
D. Cu |
| 44. | What is the process of transpiration in plants? |
A. light-respiration | |
B. loss of water | |
C. food production | |
D. breathing |
| 45. | What is the loss of water in the form of water points called? |
A. evaporation | |
B. discharged | |
C. transpiration | |
D. Bindustrava |
| 46. | In transpiration- |
A. Carbon dioxide comes out from the leaves. | |
B. Water evaporates from the leaves. | |
C. drops of water from the leaves | |
D. leaves release oxygen |
| 47. | Transpiration measuring device is – |
A. hygrometer | |
B. crescometer | |
C. potometer | |
D. clinometer |
| 48. | What is the process of transpiration in plants? |
A. Root | |
B. Trunk | |
C. leaf | |
D. whole plant |
| 49. | The condition in which transpiration will be more rapid is |
A. low wind speed | |
B. low humidity and high temperature | |
C. high humidity | |
D. excess amount of water in the ground |
| 50. | Leaves have two main functions – |
A. evaporation and respiration | |
B. respiration and digestion | |
C. photosynthesis and respiration | |
D. photosynthesis and transpiration |