Is Ubuntu built on Debian?

Related questions

1. Is Ubuntu a Debian based system?
2. What version of Debian is Kali?
3. What is Debian Jessie?
4. Is Ubuntu and Debian same?
5. Is Mint more stable than Ubuntu?
6. What package manager does Debian use?
7. What is Debian stable?
8. Whats the difference between Debian and Ubuntu?
9. What is yum package manager?
10. What is Debian Wheezy?

Tags

1. #debian
2. #several
3. #based
4. #there
5. #distro
6. #linux
7. #other
8. #distributions
9. #confuses
10. #ubuntu
11. #slackware