What might introduction of exotic species disrupt an ecosystem

Which of these organisms have the greatest amount of cell specialized

This is one form of rna that transports a specific amino acid to a ribosome during protein synthesis.

There are specialized producers that live in warm water vents deep in the ocean. these producers do not per-form from photosynthesis, but instead perform a similar process with iron and other chemicals. why do you think these producers use this process instead of photosynthesis?