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Biology, 21.06.2019 16:00
Why was the sample heated in step 5? describe the chemical principles involved in the reasoning behind this step?
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When fossil fuels are burned, carbon dioxide is released. how does this gas impact the environment?
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Biology, 22.06.2019 18:00
Which is an innovation of gymnosperms? gymnosperms are the first seed plants. gymnosperms are the first flowering plants. gymnosperms are the first vascular plants. gymnosperms are the first spore plants.
Answers: 3
Biology, 23.06.2019 00:20
Why does competiton happen? a: different organisms have different needsb: there are limited resources in an ecosystemc: there are no predators in an ecosystemd: organisms do not need the same resources (i think it's b but i'm not sure)
Answers: 2
What is the role of heat in the formation of new rocks?...
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