The integration of information technology and the continuous development of the information network make the college physical education degree of information technology constantly improving. College physical education...The integration of information technology and the continuous development of the information network make the college physical education degree of information technology constantly improving. College physical education is not only formed in the internal network, then sharing information resources and making sports teaching organization efficient as a whole, but communicate with the external network, formatting the Internet and producing significant changes in the teaching environment of college sports and sports teaching. College physical education is facing the reformation of better educated and digitization, virtualization, molecules, networking, agile and globalization. Physical education and sports teaching degree of information is closely related.展开更多
MOOCs as a new kind ofordine teaching mode worldwide at breakneck speed. This paper analyzes the development and advantages of MOOCs, to draw lessons fi＇om the successful experience of the MOOCs, build conform to the...MOOCs as a new kind ofordine teaching mode worldwide at breakneck speed. This paper analyzes the development and advantages of MOOCs, to draw lessons fi＇om the successful experience of the MOOCs, build conform to the demand of our colleges and universities graduate education MOOCs platforrr~ promote excellent education experts in the army,high-quality teaching resource sharing, to promote the teaching idea transformation,teaching content update and the teaching method reform, improve the quality of military high-level talent cultivation.展开更多
Batesian mimics are harmless prey species that resemble dangerous ones （models）, and thus receive protection from predators. How such adaptive resemblances evolve is a classical problem in evolutionary biology. Mimi...Batesian mimics are harmless prey species that resemble dangerous ones （models）, and thus receive protection from predators. How such adaptive resemblances evolve is a classical problem in evolutionary biology. Mimicry is typically thought to be difficult to evolve, especially if the model and mimic produce the convergent phenotype through different proximate mecha- nisms. However, mimicry may evolve more readily if mimic and model share similar pathways for producing the convergent phenotype. In such cases, these pathways can be co-opted in ancestral mimic populations to produce high-fidelity mimicry with- out the need for major evolutionary innovations. Here, we show that a Batesian mimic, the scarlet kingsnake Larnpropeltis elap-soides, produces its coloration using the same physiological mechanisms as does its model, the eastern coral snake Micrurus fulvius. Therefore, precise color mimicry may have been able to evolve easily in this system. Generally, we know relatively little about the proximate mechanisms underlying mimicry .展开更多
文摘The integration of information technology and the continuous development of the information network make the college physical education degree of information technology constantly improving. College physical education is not only formed in the internal network, then sharing information resources and making sports teaching organization efficient as a whole, but communicate with the external network, formatting the Internet and producing significant changes in the teaching environment of college sports and sports teaching. College physical education is facing the reformation of better educated and digitization, virtualization, molecules, networking, agile and globalization. Physical education and sports teaching degree of information is closely related.
文摘MOOCs as a new kind ofordine teaching mode worldwide at breakneck speed. This paper analyzes the development and advantages of MOOCs, to draw lessons fi＇om the successful experience of the MOOCs, build conform to the demand of our colleges and universities graduate education MOOCs platforrr~ promote excellent education experts in the army,high-quality teaching resource sharing, to promote the teaching idea transformation,teaching content update and the teaching method reform, improve the quality of military high-level talent cultivation.
基金We thank Karin Pfennig, Ver6nica Rodriguez-Moncalvo, Lisa Bono, and three anonymous refe-rees for helpful comments. Antonio Serrato helped with specimen collection. Chris Willett and Erin Burch aided with spectroscopy, and Vicky Madden and Steven Ray provided TEM services. Ken Wray kindly furnished coral snake speci-mens. Animal research was conducted under UNC IACUC permit 11-108. Funding was provided by the National Science Foundation （DEB-1110385 and DEB - 1019479）.
文摘Batesian mimics are harmless prey species that resemble dangerous ones （models）, and thus receive protection from predators. How such adaptive resemblances evolve is a classical problem in evolutionary biology. Mimicry is typically thought to be difficult to evolve, especially if the model and mimic produce the convergent phenotype through different proximate mecha- nisms. However, mimicry may evolve more readily if mimic and model share similar pathways for producing the convergent phenotype. In such cases, these pathways can be co-opted in ancestral mimic populations to produce high-fidelity mimicry with- out the need for major evolutionary innovations. Here, we show that a Batesian mimic, the scarlet kingsnake Larnpropeltis elap-soides, produces its coloration using the same physiological mechanisms as does its model, the eastern coral snake Micrurus fulvius. Therefore, precise color mimicry may have been able to evolve easily in this system. Generally, we know relatively little about the proximate mechanisms underlying mimicry .
