How did Ripley know it was a queen?
Ripley suspects that she has a Chestburster inside and has it confirms it, when 85 gives her an x-ray. Even when Ripley confronts the Xenomorph, it won't kill her because it knows she is carrying a Queen. X-Ray of Ripley showing the Queen Chestburster.
Ripley suspects that she has a Chestburster inside and has it confirms it, when 85 gives her an x-ray. Even when Ripley confronts the Xenomorph, it won't kill her because it knows she is carrying a Queen. X-Ray of Ripley showing the Queen Chestburster.