[Non-Sequitur]

"And of every living thing of all flesh you shall bring two of every sort into the ark, to keep them alive with you, they shall be male and female" Genesis 6:19

Seems to me that would include T-Rex, Brontosaurus, every other dinosaur.

[Doctor Stochastic]

...they shall be male and female...

A single earthworm is male and female, but she wouldn't suffice, of course.