In the Voyager episode “Collective,” Seven of Nine clarifies that the Borg babies aren't born but captured and then put into a maturation chamber to accelerate their growth. This explains how Seven was assimilated as a little kid but grew up into an adult Borg.
The Borg reproduce through assmilation the forceful taking of others and adding them into the collective. The Borg are selective in who they take. Technology is the priority but numbers are also a secondary objective.
The episode first aired in broadcast syndication on May 5, 1989. It was written by executive producer Maurice Hurley and directed by Rob Bowman. "Q Who" marked the first appearance of the Borg, who were designed by Hurley and originally intended to appear in the first season episode "The Neutral Zone".
Annika was placed into a Borg maturation chamber for the next few years, during which time she joined the collective. Following this, she was a Borg drone and assimilated individuals from a number of species, including a crew member from the USS Melbourne at the Battle of Wolf 359 on Stardate 43989.1.
Biologically speaking Seven of Nine is the human Annika Hansen who's mother was Erin Hansen. As far as psychologically speaking goes, the Borg Queen sees herself as the mother of EVERY Borg drone and as she is the will of the Collective, all the drones believe so as well.
Zero (Angus Imrie) merged his mind with the Borg Collective, but his attempt to ask for a solution about the Living Construct fell on dead ears. Instead, the Borg quickly assimilated Zero.
Species 8472: Also known as the Undine, they were a highly advanced and biologically unique species from fluidic space. Due to their vastly different biology, the Borg were unable to assimilate or adapt to them.
The Borg discover Species 8472 in the Delta Quadrant and try to assimilate its biotechnology, which is more advanced than anything the Borg have seen. The Borg quickly realize that Species 8472 is immune to assimilation and that contemporary Borg technology is no match for it.
Officially, the existence of a Borg homeworld is a hypothetical one as it has yet to be revealed in a canon Star Trek source. However, an identity for the Borg homeworld is given by the non-canon novel Lost Souls, which names it Arehaz.
This was later disproved by several episodes of Star Trek: Voyager, which stated that the Borg expand their numbers through assimilation only (see Seven of Nine's quote about the fetal Borg below, for example), capturing babies and children and then placing them in maturation chambers to accelerate their growth.
In the Voyager episode “Collective,” Seven of Nine clarifies that the Borg babies aren't born but captured and then put into a maturation chamber to accelerate their growth. This explains how Seven was assimilated as a little kid but grew up into an adult Borg.
A borg (short for blackout rage gallon) is a mixed drink made in a plastic gallon jug, containing water, vodka, flavored drink mix such as MiO or Kool-Aid, and sometimes electrolyte mix such as Pedialyte.
By the time of the series finale, "Endgame", The Doctor had managed to remove the implant, allowing Seven to pursue a relationship with Chakotay. The alternative future seen at the start of the episode showed that Seven and Chakotay were eventually married, but she died while Voyager was still travelling home.
Only one Queen exists at any given time; when she is destroyed, a new Queen takes her place. In Star Trek: Voyager, it's revealed that the Borg Queen isn't a singular entity, but the name given to any that serves as its host, possessing all previous Queen's collective consciousness.
However, the Queen captures the admiral and begins to assimilate her into the Borg collective. Admiral Janeway then turns the tables by unleashing a pathogen she was carrying in her bloodstream into the collective, devastating it and killing the Queen.
The Borg, while still a powerful threat, are nothing compared to this type of power. The Q are not only able to defeat their entire race without breaking a sweat, but can also eradicate any trace of their existence altogether.
Species 8472 possessed superior bio-technology to the Borg Collective, and used it to swiftly destroy multiple Borg Cubes. Species 8472 launched their own invasion of Borg space, something that Janeway believed to be a major threat to the future of the Delta Quadrant.
As far as I know, the "Bad Borg" hail from the Delta Quadrant, and though we don't know just how old that collective is, it is ancient. The "Good Borg", Jurati's Borg, were established in the Alpha Quadrant in the 21st century, when the queen from the alternate timeline and Jurati merged.
Q seemed frightened of Guinan, telling Picard that she is "not what she appears to be," and that Picard should remove her from the Enterprise. Considering Q's abilities, it's unclear why he would be afraid of Guinan, and Star Trek has never offered a real explanation for Q's reaction.
The borg collective as a whole didn't join the federation it was just a small splinter group of the borg that joined the federation the main borg collective is still an enemy of the federation and would mostly likely never join the federation instead would keep on trying to assimilate the federation.
Other times, notably during "Deja Q" and Voyager, Q appears to the crew seeking assistance. Gene Roddenberry chose the letter "Q" in honor of his friend Janet Quarton.
