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