| 1. | Type AB | 2. | Type O |
| 3. | Type A | 4. | Type B |
| 1. | Tubectomy |
| 2. | Diaphragms |
| 3. | IUDs (Intra Uterine Devices) |
| 4. | Cervical caps |
| 1. | secondary growth | 2. | disease resistance |
| 3. | reproduction | 4. | conserving water |
The function of leghemoglobin in the root nodules of legumes is:
1. oxygen removal
2. nodule differentiation
3. expression of nif gene
4. inhibition of nitrogenase activity
1. Heart
2. Kidney
3. Pancreas
4. Brain
1. Rennin
2. Lipase
3. Trypsin
4. Pepsin
1. vitamin-C
2. vitamin-D
3. vitamin-A
4. vitamin-B
1. fungi
2. viruses
3. insects
4. nematodes