What is the flower that stands for: patriotism?

Questions

Thomas Edison, lightbulb inventor, was afraid of the?

Some ribbon worms will eat _______ if they cant find any food?

Dolphins ________ with one eye open?

The worlds oldest piece of chewing gum is over _____ years old?

In space, astronauts cannot cry, because there is no ________, so the tears can't flow?