1. extensive root system,small and thick leaves
2. extensive shoot system
3. profuse and large flowers
4. extensive air spaces
extensive root system,small and thick leaves
1. Distantly related species growing in different habitat
2. Distantly related species growing in the same habitat
3. Closely related species growing in different habitat
4. Closely related species growing in the same habitat
Closely related species growing in the same habitat
1. Relative number of individuals at each age
2. Number of newborns each year
3. Number of young reaching puberty each year
4. Relative number of deaths at each age
Relative number of individuals at each age
1. mesophytes
2. xerophytes
3. hygrophytes
4. hydrophytes
xerophytes
1. coal
2. oil
3. organic compounds
4. nuclear energy
nuclear energy
1. 6%
2. 10%
3. 12%
4. 14%
6\%
1. afforestation
2. argoforestry
3. deforestation
4. social,forestry
afforestation
1. 1972
2. 1978
3. 1982
4. 1988
1988
1. 9%
2. 19%
3. 29%
4. 50%
19\%
1. 23%
2. 29%
3. 31%
4. 37%
23\%