Why do scientists study proteins to find evidence for evolution

This is the diveristy of ecosystems natural communites and habits it is the variety of ways that species interact with each other and their environment

Which was most likely an effect on society that resulted from improvements in blood handling during world war i and world war ii?

What is the main reason that attitudes are more often revealed in spoken rather than written language? a. in writing, we try to put the "best face" on what we write. b. we speak far more often than we write. c. in writing, we can more easily conceal our attitudes. d. in spoken language, we are often careless in our use of words.