Organisms in the lowest trophic level of an ecosystem are always what ?

What heat is removed how does a gas become a liquid

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?

The chemical form of energy that is useable by the cell to do work