North America
Asia
Antarctica
Australia
All of the above
Growing quickly
Developing fire-resistant cover
Having deep roots
A combination of the above defenses
They have thorns
They have toxic chemicals
Ants protect them
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.
Dry and wet
Spring and summer
Winter and summer
Winter and fall
Desert
Tundra
Grassland
Temperate forest