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