Biology, 13.01.2021 14:00, jwmiciche7367

Why has it been necessary to make so many changes to our paper currency in the past 30 years as compared to the last 100 years

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Biology, 22.06.2019 09:00, webbhlharryteach

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Biology, 22.06.2019 13:30, dmurdock1973

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Biology, 22.06.2019 18:00, barnhill4755

The images show two species of tree frogs in a particular region. the gray tree frogs are adapted to the trees of the woodlands, while the green tree frogs can survive in woodlands or grasslands. the gray frog was abundant in the woodlands. because of climatic changes, most of the trees in the region died, and the woodlands changed to grasslands. in such a case, the . the gray tree frog is closely related to the green tree frog genetically, but they have different mating calls. this suggests that speciation occurred because of .

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Why has it been necessary to make so many changes to our paper currency in the past 30 years as comp...