And, I just found out that you need the Beast Den to research and build named bloodhounds. Usually I do not use Beast Dens, so I wonder, what else I am missing.
To have all base functions, you need to have (at least):
Armory Tower
Luxury Spa
Still
Mint
Refinery
Red Tower
Extractor
Industrial Printer
Power Station
Fusion Reactor
Surgery Room
Computer Core
Cloning Centre
Beast Den
For most of the game, you'll probably want to have a Library, Lab, and Summoning Circle (superceded by Red Mage Tower), as well as a Workshop (superceded by Industrial Printer/Armory Tower), a Medbay (superceded by Surgery Room), and a Mess Hall (superceded by Luxury Spa). Please note that not all of the above may be used in research or, as a matter of fact, anything at all (looking at you, Red Mage).