Which atmospheric layer has the greatest air pressure? o mesosphere o thermosphere o stratosphere o troposphere​

When organisms are classified ,they are given a two part name

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?

What are the characteristics of living things