Cowboys and the landscape that today is Canyonlands National Park long went together. Early in the 1900s, one cattle company actually grazed from the area now known as Natural Bridges National Monument all the way north into the Needles District of Canyonlands.

Let's see how much you know about the intricate business of passing along genes in our national parks. Answers are at the end. If we catch you peeking, we'll make you write on the whiteboard 100 times: "Bacterial conjugation, which is sometime erroneously characterized as the bacterial equivalent of sexual reproduction, cannot succeed unless the donor bacterium hosts a plasmid, transposon, or similar genetic element that is conjugative or mobilizable."