Utilities apparently missing from Ubuntu15.10

[Bret Busby]

Hello.

I have just installed UbuntuMATE 15.04 amd64 version, to replace
Ubuntu.10.04 on a computer upon which I had been running Debian 6, so
as to have the latest software, whilst retaining the interface.

Having just got the UbuntuMATE 15.10 installation set up and running,
I can not find the Software Centre utility, or Synaptic, for finding
and adding available software.

Are these utilities still available?

If so, why is the Software Centre not included in the installation iso CD image?

-- 
Bret Busby
Armadale
West Australia
..............

"So once you do know what the question actually is,
 you'll know what the answer means."
- Deep Thought,
 Chapter 28 of Book 1 of
 "The Hitchhiker's Guide to the Galaxy:
 A Trilogy In Four Parts",
 written by Douglas Adams,
 published by Pan Books, 1992

....................................................