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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
Answers: 2
Biology, 22.06.2019 10:20
During convection, less dense fluid rises and denser fluid sinks.
Answers: 2
Biology, 22.06.2019 11:00
Which of the following forest management practices is best for reestablishing areas of forest?
Answers: 1
Biology, 22.06.2019 13:40
1. -define adaptation2 explain darwin's theories of descent with modification and natural selection in detail3. -explain how each of these provides evidence for evolution: a. -fossil record, including superposition and transitional fossilsb-anatomy, including homologous structuresc-biological molecules, including dna and proteins4. -explain the difference between convergent and divergent evolution.5. -define and give three examples of artificial selection6. -define and give one example of coevolution.7. -explain biodiversity and how it benefits humans.8. -explain a type of population lest affected by environmental change.
Answers: 3
Social Studies, 21.12.2019 03:31
Biology, 21.12.2019 03:31
Mathematics, 21.12.2019 03:31
Mathematics, 21.12.2019 03:31
History, 21.12.2019 03:31
Mathematics, 21.12.2019 03:31
History, 21.12.2019 03:31
History, 21.12.2019 03:31