A. | Decreases from equator to polar regions |
B. | The area with very few plant and animal species with threatened species are called hotspots |
C. | Increases from higher altitudes to lower altitudes |
D. | Depletion of genetic diversity of crop plants is mainly due to introduction of better varities with high yeild, decrease resistance etc. |
E. | Increases from tropical forests to temperate forests |
1. | Limited human activity, no human activity and full human activity without ecological disturbance |
2. | Full human activity without ecological disturbance, limited human activity and no human activity |
3. | No human activity, limited human activity and full human activity without ecological disturbance |
4. | Full human activity without ecological disturbance, no human activity and limited human activity |
1. | alien species | 2. | endemic species |
3. | exotic species | 4. | keystone species |