In this form, it's really a bi-phasic disease, meaning it has two forms.

CNN: "The Secret Life of Germs" author Philip Tierno

The weather has come in two forms: drought and flood.

ECONOMIST: From none to too much

The mixed-race population has increased, due to both inter-racial marriages and Census Bureau forms in the past two headcounts that allow people to identify themselves as more than one race.

WSJ: Population Leaves Heartland Behind

The creature's discovery has astounded scientists because their age puts them within two recognized groups of pterodactyls -- primitive long-tailed forms and advanced short-tail forms -- and they display characteristics of both.

CNN: Pterodactyl fossil fills gaps in evolutionary tale