Biology, 25.03.2020 01:53 willveloz4

How many species are we losing every hour?

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Biology, 22.06.2019 04:00, jessebeck0805

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Biology, 22.06.2019 11:30, smartie80

About how many years does it take for one cycle of surface water to become deep water and then surface water again in the oceans? 101001,000

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Biology, 22.06.2019 15:40, mesposito

During crossing-over, a. genetic material is exchanged between nonsister chromatids, resulting in new combinations of alleles. b. nonsister chromatids from each homologous chromosome of a tetrad are exchanged, resulting in new combinations of alleles. c. one homologous chromosome of a tetrad is exchanged with another tetrad, resulting in new combinations of alleles. d. sister chromatids from each homologous chromosome of a tetrad are exchanged, resulting in new combinations of alleles. e. genetic material is exchanged between sister chromatids, resulting in new combinations of alleles.

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Biology, 22.06.2019 19:40, kmcpig

4. multiple crosses were made between true-breeding lines of black and yellow labrador retrievers. all the f1 progeny were black. when these progeny were intercrossed, they produced an f2 consisting of 91 black, 39 yellow and 30 chocolate. a. propose an explanation for the inheritance of coat color in labradors. b. propose a biochemical pathway for coat color determination and indicate how the relevant genes control coat coloration.