Major enters carefully but will retreat at the first sign that the tree moves on its own. He will try to do a search without touching anything.
Uhura will go to the other side of the passage to see what Major is seeing but she does not enter.
Major will leave the room and go to the place where Uhura found the wall that looked like a door and open it.
Uhura goes further up the passageway so major can open the door. She keeps her analyzer and gun ready but she also puts the light on Seth and Artemis to make sure they're not coming close.