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Two bird species have different mating calls, occupy different habitats in nature, and when they hybridize, the hybrids are infertile. Which isolating mechanisms maintain these species?
1. mechanical isolation, hybrid sterility, geographical isolation
2. ecological isolation, mechanical isolation, hybrid sterility
3. geographical isolation, temporal isolation, behavioral isolation
4. ecological isolation, behavioral isolation, and hybrid sterility
Answers: 3
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The vaccine in a flu shot contains weakened flu viruses. how does a flu shot work with the immune system? a. it destroys lymphocytes. b. it destroys macrophages. c. it activates macrophages. d. it activates lymphocytes.
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Climate warming trends allow plant and insect species to inhabit larger ranges. select the best answer from the choices provided
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Two bird species have different mating calls, occupy different habitats in nature, and when they hyb...
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