Because reptiles have not developed the technology to make warm coats.
-Permafrost
yes
Tundra. The arctic tundra in the summer and then they migrate to the Boreal Forest in the winter.
death
Mammals and birds both do well in the tundra. Fish, reptiles and amphibians--not so much. The best answer would probably be 'warm blooded'.
Where would you expect to find most of the people of North Africa living
arizona
They are frogs and tadpoles.
Increase
I would assume that Canada is mostly covered in evergreens, so the biome would be taiga. Also, in the more northerly latitudes one would expect the biome to be tundra.
Decomposers feeding on living things.
Increase