Misc: what are two numbers that have no divisors in common?

Questions

There are more than 100 million ----------?

The nematode Caenorhabditis elegans ages the equivalent of 5 human years for every day they live, usually expiring after 14 days. However, when stressed, the ?

The duckbill platypus of Australia can store up to 600 worms in its large cheek ----------?

Sharks can be dangerous even before they are born. Scientist Stewart Springer was bitten by a sand tiger shark embryo while he was examining its ----------?

There are more than 450 species of ---------- throughout the world.?