Astronomers use light years to measure distances in space because space is so massive and distances so far that conventional numbering is inadequate and unmanageable. One light year is a distance measurement equivalent to six trillion miles.
B. the intensity o stimulus and the observer's criteria.
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All the organisms of one kind in an ecosystem are called a population. For example, a pond ecosystem might have populations of frogs, waterlilies, insects, duckweed, and protists. Populations living and interacting with each other form a community.
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Interphase should be the stage of the cell
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The oceans could become polluted with oil, coal, and other contaminents that would come about when mining in such a grand scale
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