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