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