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Which of the following viruses would be most likely to have reverse transcriptase packaged within its virion?

Which of the following periods saw the greatest Animal diversification of Phyla, and was the beginning of most current animal phyla (major groupings)? 

What had to become prevalent before Areobic Respirating bacteria could grow in number in the ancient seas (prior to the development of multicellularity/Eukaryotes)?

Primarily it is the changes in what viral structures that allow enveloped viruses like influenza to spread to new host species and new tissues?

At what point do we see the earliest evidence for animal life?

When do the first forests appear, (large non-woody forests)? Hint: Also characterized by the highest Oxygen levels ever.

Which of the following items are associated with conjugation?

When do the first flowering plants appear?

Which of the following methods is NOT a method used by bacteria to recombine their DNA to increase genetic diversity?

What period saw the development of Diapsids, Synapsids and Anapsids?