our first alien scene

Milburn In this scene, he basically discovers an indigenous worm in some black liquid, This scene also makes it clear that the worms are indigenous creatures to that planet.proving the existence of life originating on another planet my opinion is that the worm-like creatures that he and Fifield later encounter is live on planet there are a lot of evidence(like are many worms where the ampule the black goo are get out of the ampule),they are being there by the enginer to experiment the black goo or the 2 worms are use to terraforming the establishment there ,we see when 1 worm float in black liquid. question what i have;why has deleted scene(maybe to us to belive that worms are from earth),why the worms living there (maybe are more creature there),what move on the top a ampule(move like its the worms and david smiley like he found life?are worms in ampule?)and many ...question what your opinion guys???