Is Ubuntu a Debian based system?

Related questions

1. What is Debian Wheezy?
2. Is Ubuntu built on Debian?
3. Whats the difference between Debian and Ubuntu?
4. What is Debian server?
5. Which is better Ubuntu or Mint?
6. What is yum package manager?
7. What is Debian stable?
8. Is Debian Free?
9. What is Debian Jessie?
10. What version of Debian is Kali?

Tags

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