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