What is it called when a molecule moves across a membrane through a protein channel without using energy

The asian shore crab (hemigrapsus sanguineus) is an invasive species that has impacted the atlantic coast. predict what characteristic of this invader would most likely disrupt the biodiversity of this area.

2. given that most biochemical (other than coal) rocks react with hydrochloric acid, what does that tell you about organisms?

Variety of living organisms; includes genetic, species, and ecological types.