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Question: what is plural for platypus I found the following answer on Google: It is one of the few venomous mammals , the male platypus having a spur on the hind foot that delivers a venom capable of causing severe pain to humans. Is that a correct answer? Yes or no.
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No

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Question: what ancient cultures had marketplaces I found the following answer on Google: There was a very large amount of commerce between the provinces of the Roman Empire, since its transportation technology was very efficient. Is that a correct answer? Yes or no.
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No

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Question: how does uv light activated fluorescence I found the following answer on Google: However, when the absorbed electromagnetic radiation is intense, it is possible for one electron to absorb two photons ; this two-photon absorption can lead to emission of radiation having a shorter wavelength than the absorbed radiation. Is that a correct answer? Yes or no.
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No