Which of the following are examples of geographic barriers? Choose two.
Body of water
small stream
Mountain
dirt road
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Cells tend to have a relatively small and uniform size. why aren’t cells larger?

Which statements describe resources? one of the factors people use when deciding where they will live is the availability of resources. renewable resources have little value for people. resources are unevenly distributed throughout the world. energy is the world resource which has the highest use. the use of nonrenewable resources has decreased in recent history. the use of resources is evenly distributed throughout the world. the world's oil supply will last for the next forty years if its use continues as expected.

Variety of living organisms; includes genetic, species, and ecological types.