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Biology, 21.06.2019 14:00
According to the law of conservation of energy, energy can neither be created nor destroyed. if this is true, why is there less energy in the top of the energy pyramid than there is in the bottom of the energy pyramid?
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Biology, 22.06.2019 08:20
Which characteristics are typical of a human population in the postindustrial stage?
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Biology, 22.06.2019 16:30
These are the components of the reservoirs of carbon that are exchanged in our environment.
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How is the nervous system affected by heart disease?...
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