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