Eukaryotes are organisms whose cells have a nucleus enclosed within membranes, unlike prokaryotes. Eukaryotes belong to the domain Eukaryota or Eukarya.
<span>to withstand the winds placed upon them by an earthquake ect. this is from what I've learned in simplest form</span>
Sunlight is the main energy source
Your Question: How did water come to earth?
Your answer: As a standard comet nears the heat of the Sun, the ice particles from its nucleus sublimate or go directly from solid ice to a gas, which can then condense later into liquid water if it were, say, to arrive on a planet's surface.
Hope this helped! :)
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