Any type of terrestrial land plant and some aquatic plants too (since you mentioned that it isn't motile)
In some capacity, earth scientists study all of the above listed. They focus on ecology (how different organisms function within ecosystems), food chains, climates and weather patterns, aspects of the atmosphere, soil and the Earth's mineral components, farming, and how man's machines both help and hurt the environment.
I think it is increase the amount of substrate.
Replication from formation and separation of the strands
