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