What period of the paleozoic era did a mass extinction occur?

a. devonian
b. pennsylvanian
c. siluarian
d. permian

If you're using an existing powerpoint presentation that will receive new slides based on a word outline, select the a. slide that will appear after the new slides. b. first slide in the presentation. c. slide that will appear before the new slides. d. last slide in the presentation.

What does the faves button do? a. users mark a web page as a favorite b. leads other readers to favor a specific page c. readers sort and align their favicons, or favorite icons d. leads users to a message board where they can post questions

Some peer-to-peer networks have a server and some don't. true false