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Biology, 21.06.2019 23:00, genesisheaven1
The circles, or orbits, for electrons are called energy levels. each level can hold only a certain number of electrons. add electrons to each level until you can't add any more. how many electrons can each level hold?
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Biology, 22.06.2019 05:30, coolcat3190
How does the nervous system affect the excretory system?
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Biology, 22.06.2019 08:00, julielebo8
What is usually (but not always) related to the metabolic processes of living organisms in its organic form?
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What hormone regulates the formation of urine...
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Mathematics, 12.06.2020 20:57
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