1. Each species has unique characteristics.
2. A species is the darkness of a gene pool.
3. Always trying to adapt to the environment.
4. They exchange genes with each other.
5. They have the ability to create new species.
6. Members of the same species have the most characteristics in common.
7. Members of the same species are capable of producing fertile offspring through sexual intercourse.
8. An organism of one species is incapable of producing fertile offspring by sexual intercourse with another species. Asexual reproduction produces a mule from the mating of a horse and a donkey, and a liger from the mating of a tiger and a lion.
9. Differences in characteristics between different organisms of the same species will be continuous.
10. A group of organisms descended from a common ancestor.