Relating to cities and the people that live in them

A biome with leaf shedding trees and four seasons

All organisms in an area

The community of living things plus the non-living things that support them in an area

A group of individuals of the same kind living in a certain area

Living or growing on earth

A change in a plant or animal that makes it better able to live in a particular place or situtation

A layer of soil that is permanently frozen in very cold parts of the world

A large area of flat land in the northern parts of the world where there are no trees and the ground is always frozen

A group of plants or animals that are similar and can produce offspring

An organisms specific environment

A large area where the winters are cold but the summer are mild enough to allow the ground to thaw and have growth of coniferous trees and mosses