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Biology, 22.06.2019 10:00
Veins have a much lower blood pressure than arteries. which of these prevents backflow of blood in veins? a. pressure applied by the heart b. one–way valves in veins c. thin muscular walls of veins
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Biology, 22.06.2019 14:30
Even though the ostrich is a flightless bird, ostriches still possess wings that stretch approximately two meters across when fully extended. scientists speculate that when dinosaurs became extinct, some of the birds that lived during that time became land dwellers since they were able to consume the food that the dinosaurs once ate. over time, these species grew larger and heavier. eventually, the ostrich species became too big to fly. the wings found on ostriches are known as a. analogous structures. b. homologous structures. c. vestigial structures. d. symmetrical structures.
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Biology, 22.06.2019 15:00
The color of the fur is the genotypephenotype.the genetic combination of alleles that determine the fur color is called the genotypephenotype.
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Biology, 22.06.2019 18:30
Which gas prevents the spread of fire and extinguishes it? is a type of compressed gas that prevents the spread of fire and extinguishes it.
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Mathematics, 29.01.2021 21:30
Mathematics, 29.01.2021 21:30
Mathematics, 29.01.2021 21:30
Mathematics, 29.01.2021 21:30
Mathematics, 29.01.2021 21:30
Mathematics, 29.01.2021 21:30
English, 29.01.2021 21:30
Mathematics, 29.01.2021 21:30
Chemistry, 29.01.2021 21:30
Mathematics, 29.01.2021 21:30
Mathematics, 29.01.2021 21:30