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