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Biology, 31.01.2020 08:06 shiny9362

Ken enjoys bird watching. every summer, he sees many ruby-throated hummingbirds in his garden. however, during the winter, he never sees any ruby-throated hummingbirds. which of the following is a testable hypothesis that ken could make to explain the winter absence of the hummingbirds?

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Ken enjoys bird watching. every summer, he sees many ruby-throated hummingbirds in his garden. howev...
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