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Biology, 21.06.2019 18:00
The phlogiston theory in the 17th century attempted to explain burning. the theory stated that combustable objects contained a material called phlogiston, a substance without mass, color, odor, etc. after objects burned, the objects were dephlogistonated and were then in their true form. the phlogiston theory was accepted until the 18th century, when lavoisier proved that combustion requires a gas that has mass. phlogiston is considered a) to be scientific knowledge b) not to be scientific knowledge c) to be proven by scientific method d) to be accepted in the modern scientific community
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Biology, 22.06.2019 12:40
In which part of the body is a ball-and-socket joint found?
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Biology, 22.06.2019 13:00
Which of the following cell structures is significantly different between gram- positive and gram-negative bacteria?
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Which is a part of interphase a. g1 phase b. telophase c. cytokinesis d. prophase...
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