Heat from the Earth’s core and radiation from the sun is transferred to the surface of the Earth’s by conduction.
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They search for water. When there is water, life can thrive. Water comes before oxygen and other things humans need to survive, because “life” means just what it sounds like. It can be large aliens or microscopic bacteria. Therefore, when there is water, there could be life, and that’s why astrobiologists look for it.
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Answer: Heterotrophs obtain energy by eating plants and animals. Plants are autotrophs, absorbing the sun's energy through photosynthesis and making glucose.
Explanation:
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The units of evolution are populations and not individuals because a variation or a mutation in an individual is not sure to last or produce offsprings having the same variation or mutation. The proof that a species has truly evolved is when the variation has allowed the species to survive its environment and produce generations carrying the same variation.
