The following points highlight the fourteen main factors affecting growth and reproduction of an organism. The factors are: 1. Troposphere 2. Stratosphere 3. Mesosphere 4. Thermosphere 5. Exosphere 6. Homosphere 7. Hetrosphere 8. Air Composition 9. Gases in Water 10. Light 11. Temperature 12. Water 13. Soil 14. Fire. Factor # 1. Troposphere: This represents the linear portion of the [...]
The following points highlight the top six concepts of the kingdom system of organisms classification. The concepts are: 1. Two Kingdom Systems 2. Three Kingdom System 3. Four Kingdom Systems 4. Five Kingdom Systems 5. Six Kingdom System 6. Eight Kingdom System. 1. Two Kingdom Systems (Lennaeus' Concept): When we look long back in the prehistoric times, we find that [...]
It was realized by the biologists during recent past (1970s-80s) that the classification based on genetic characteristics (rather than phenotypic ones) with respect to evolutionary relatedness (phylogeny) of organisms may prove more stable and predictable. In 1987, Carl Woese of University of Illinois (USA) summarized ten years of work and proposed a phylogenetic classification system for prokaryotic species based on [...]