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