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