What extends from the tops of the
tallest mountains to the bottom of the
ocean and is anywhere on the surface
of the earth that life exists?
a. a biome
b. an ecosystem
city the biosphere
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The idea that all living things are made up of cells is considered scientific law. this means the idea is an emerging scientific idea that has a logical explanation. has been tested with similar results at least twice. is supported by scientific consensus and a large amount of evidence. has been rejected only once by the scientific community

Which of the following must be true for a fossil organism to be useful as an index fossil? a. the fossil organism must be widespread geographically. b. the fossil organism must be abundant. c. the fossil organism must be limited to a short span of geologic time. d. all of the above.

Earthquakes a. created the rock in arches utah b. can be caused by volcanic eruptions c. are caused by tsunami waves d. wear mountains down into hills