Species changes over time to better survive in its environment
Maintaining stable internal conditions
permanently frozen ground
an organism made of an algae and fungus that grows in Tundra
type of tree where that looses leaves in colder weather
Type of tree with needles that do not shed leaves
few trees that are taller than the canopy
Tall trees that form a leafy roof in the rainforest
second level of shorter trees and vines in the rainforest
The bottom layer of plants in a rainforest
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