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