Identify the correct statement:
1. | Eutrophic lakes contain fewer nutrients than oligotrophic lakes. |
2. | Xerarch succession is a primary succession that occurs in water bodies. |
3. | Most ecologists believe that most communities achieve stable, unchanging climax vegetation. |
4. | A mature ecosystem has greater species richness, greater biomass, and less net productivity than a younger stage of succession. |
The threat of extinction will be highest for:
1. | a very small population in an unstable environment |
2. | a moderate-sized population of r strategists |
3. | a large population with lots of genetic variabilities |
4. | a moderate sized population in a stable environment |
Under a particular set of selection pressures, organisms evolve towards the most efficient:
1. | Thermoregulation | 2. | Water conservation |
3. | Respiration | 4. | Reproduction strategy |
What will happen to a well-growing herbaceous plant in the forest if it is transplanted outside the forest in a park?
1. | It will grow normally |
2. | It will grow well because it is planted in the same locality |
3. | It may not survive because of changes in its microclimate |
4. | It grows very well because the plant gets more sunlight |
Populations and species of larger size are found in colder environments, while populations and species of smaller size are found in warmer regions. This is:
1. | Allen’s rule | 2. | Hesse’s rule |
3. | Allee effect | 4. | Bergman’s rule |