Here are 2 categories from the 5-1-2019 Jeopardy! match.

The players got all the clues in 3 “I”S, except the $800 one (*)

($200) Discovered by accident in 1928, it was the world’s first true antibiotic
($400) Ripped ab muscles are said to have this, the state of being clearly outlined
($600) To start something or to ceremonially make someone a new member of a society
*($800) A government’s formal approval of a treaty
($1000) A Latin term used by Freud gives us this adjective meaning “lustful”

ANSWERS: show

The players got all the clues in ORDER, except the $600 one (*):

($200) Insects in the order Embioptera have glands that secrete this in order to spin the web tunnels in which they live
($400) There are more than 2,000 species in this order of animals including the capybara & the porcupine
*($600) An anteater is in the order Pilosa. This similar looking animal is in the order Tubulidentata
($800) Sheep are members of the order Artiodactyla, meaning they have an “even” number of these
($1000) Lesser-known members of this animal order are the narwhal & the dwarf sperm whale

ANSWERS: show

Today’s Daily Doubles and more information on Final Jeopardy! on Fikkle Fame’s full Daily Jeopardy! Recap