Continuity mistake: After the scene where the first Umbrella Corp. employee gets eaten, the rest are discussing what just occurred. All their clothes appear to be dry. They just scrambled to get out of the river and should all be soaking wet.
Continuity mistake: When Cole is lost in that underground cave, first he has a silver torch with a handle, and then when he meets Tran he has a thick chunky one, then it changes back to the silver one.
Continuity mistake: The woman who falls off the boat is pulled underwater by the crocodile. When she is rescued, there are no signs of bite marks or any other trauma.
Answer: No, it doesn't. The characters speculate that the anacondas are unusually large because the orchids are part of the food chain in the area; then have a discussion over whether or not the orchids would have the same effect on humans. This discussion is unresolved and the question goes unanswered for the rest of the film.
BaconIsMyBFF