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