| 1. | Red blood corpuscles of humans suffering from malaria |
| 2. | Spleen of infected humans |
| 3. | Salivary glands of a freshly moulted female anopheles mosquito |
| 4. | Saliva of an infected female anopheles mosquito |
| 1. | Cycas | 2. | Cicer |
| 3. | Pisum | 4. | Alnus |
| 1. | Exposure to cold temperature stimulates ADH release |
| 2. | An increase in glomerular blood flow stimulates the formation of angiotensin II |
| 3. | During summer when the body loses a lot of water by evaporation, the release of ADH is suppressed |
| 4. | When someone drinks a lot of water, ADH release is suppressed. |
1. cucumber
2. cotton
3. guava
4. peach
| 1. | Azospirillum | 2. | Rhizobium |
| 3. | Nostoc | 4. | Azotobacter |
| 1. | escaping any possible compression by the visceral organs |
| 2. | providing more space for a large epididymis |
| 3. | providing a secondary sexual feature for exhibiting the male sex |
| 4. | maintaining the scrotal temperature lower than the internal body temperature |
1. birds and annelids
2. amphibians and reptiles
3. insects and amphibians
4. reptiles and birds