useless trivia: What Word Means: A Rough Diamond?

Questions

Term applied to the group of plant or animal organs that are necessary for or that are accessory to the reproductive processes (reproduction)?

Terrestrial gastropod mollusk, related to the snail, but with the shell represented by an internal horny plate overlying the respiratory cavity?

The 1st buffalo ever born in captivity was born at Chicago's Lincoln Park Zoo in what year?

The 1st US minimum wage law was instituted in what year?

'The 900 days' is a chronicle about whose siege of Leningrad?