North America
Australia
Antarctica
Asia
Desert
Grassland
Temperate forest
Tundra
Bajadas
Different temperatures
Midlatitudes
Rain shadows
They have toxic chemicals
They have thorns
A combination of the above defenses
Ants protect them
Developing fire-resistant cover
All of the above
Having deep roots
Growing quickly
The savanna gets a fair amount of rain, at least 20 inches a year.
Dry and wet
Winter and summer
Spring and summer
Winter and fall
They all migrate in different directions
They eat different foods
They avoid each other as much as possible
Their territories don't overlap