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