This needs to be done ASAP!

Identify the various levels of atmosphere. troposphere mesosphere exosphere stratosphere thermosphere

Why is the theory of evolution important? it disproves all other theories about how life began. it provides a topic for debate. it is a unifying concept in biology. it explains how life began. i know for sure, it is not "it is a unifying concept in biology."

What must be done to breed dogs for a partical trait