O2 is the electron acceptor at the end of the electron transport chain.
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A Dominance hierarchy: a form of animal social structure in which a linear ranking exists, with each animal dominant over those below it and submissive to those above it in the hierarchy.
Answer:
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In science a hypothesis is a proposition relating various factors based
on limited evidence. In order to investigate and obtain further evidence
an experiment is carried out, which will either prove or disprove the
hypothesis and lead to the experiment either being changed or continued
on a larger scale to collect more evidence to support said hypothesis.
