It is clear that the cause of global warming is most related to levels of carbon dioxide in the atmosphere.

true
false

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?

How do living things obtain phosphorus

Is there any solid scientific evidence that humans have been cloned?