useless trivia: What Word Means: Unhealthful?

Questions

The average garden variety ---------- has 248 muscles in its head.?

The average garden variety caterpillar has ---------- muscles in its head.?

The ---------- is the only mammal that can't jump.?

The male ---------- can smell the virgin female gypsy moth from 8 miles away.?

The male gypsy moth can smell the virgin female gypsy moth from ---------- miles away.?