Tundra can be found on the tops of some mountains.
Treeless plain
Lots and lots
Barren
Cold
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
The cold causes fur to change colors
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
50%
30%
20%
10%
Permanent frost
Soil that stays frozen for two or more years
What happens to plants when they freeze
Any frozen soil