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