Misc: how many laps does a speedway racetrack have?

Questions

edward kennedy is the real name of which singer?

there wasn't a single pony in the 'pony express', only ______?

unlike other rna viruses, which viruses (which includes hiv) replicate backwards as dna rather than rna genomes inside their hosts, by means of an enzyme they carry called reverse transcriptase?

boston butt, jowl and picnic ham are all parts of which animal?

what science combines botany and zoology?