Lots and lots
Barren
Treeless plain
Cold
10%
20%
50%
30%
Tundra can be found on the tops of some mountains.
Shedding one color coat for another helps them stay camouflaged in most seasons
The animals try to keep up with the newest styles
The cold causes fur to change colors
The changing fur has no real purpose
What happens to plants when they freeze
Any frozen soil
Soil that stays frozen for two or more years
Permanent frost
Some plants of the tundra can perform photosynthesis at lower than normal light levels.
Keeping their extremities relatively cold
Special bones in their nose that help them save water
All of the above
Dense fat, with thick fur that covers all external surfaces