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