Why do some species evolve faster than others?

Related questions

1. Do we ever see Ash's butterfree again?
2. How do you evolve Fomantis moon?
3. What is an example of disruptive selection?
4. Is Pikachu the strongest Pokemon?
5. What does theistic evolution mean?
6. Should I evolve my Pikachu let's go?
7. Why did Charizard not obey Ash?
8. Does Ash see Pidgeot again?
9. How do you evolve Fomantis?
10. How old is the theory of evolution?

Tags

1. #while
2. #changes
3. #species
4. #allow
5. #reproduce
6. #environment
7. #conditions
8. #adaptations
9. #often
10. #caused
11. #environmental
12. #sometimes
13. #change
14. #generations
15. #possess
16. #others
17. #slowly
18. #enough
19. #extinction
20. #survive
21. #evolve
22. #necessary