Me ! i'll choose a when are lung transplants performed? what are the risks of lung transplants?

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?

As the human population grows, what happens to our natural-resource requirements? o they increase o they decrease o they do not change. they go in cycles

Most animal cells membranes have proteins that pump ions out of the cell and potassium ions into the cell