Biosphere

=== The Biosphere (FLOOR 3) ===
The biggest zone here is the zoo, which contains animals that, when infested, spawn into strong alien minions. In the west, there is an autodoc, and just north of that are the alien research pens, which the Doctor should have adequately defended by 3:30, which is the earliest that the alien can release the pens. If the humans buy the alien research, it will cost more evolution points for the alien to evolve and the alien will no long be able to release the pens. If the alien releases the pens, not only will a wave of aliens spawn from the pens, but the humans will no longer be able to get the Viral Immunity gene that makes them immune to alien infestation. It is also a good idea for human players to kill all the zoo animals early, to avoid giving the alien a chance to infest them.
The life support module is in the lower left corner of the zoo.
All shops besides explosives are available on floor 3.
There's also a conduit hatch between the pens and zoo, which can make it easy for aliens to infest this floor.
Different animals give different minions, with the highest priority male ursadaks which spawn an ultradon just above female ursadaks which spawn a breeder.
* Sheep spawn 2 broodlings
* Lyotes spawn a zergling
* Male Karaks spawn a zergling
* Crab-beetles spawn a raptor
* Tastelopes and Artosilopes spawn a hydralisk
* Ursadak calves spawn a roach
* Manta Rays spawn a glider (flying)
* Female ursadaks spawn a breeder
* Male ursadaks spawn a very powerful ultradon.
* Black Bear spawns 2x cobralisk (ranged minions)