Misc: Relating to food what are 'quenelles' type of?

Questions

Aztec emperor Montezuma had a nephew, Cuitlahac, whose name meant plenty of---------- .?

Before the 1800's there were no separately designed ---------- for right and left feet.?

Czar ---------- banished soldiers to Siberia for marching out of step.?

Czar Paul I banished soldiers to ---------- for marching out of step.?

During the ---------- period, about 500 million years ago, a day was only 20.6 hours long.?