LEONARD - Böcker

Primary sexual traits, those structures and processes directly involved in reproduction, are some of the most diverse, specialized, and bizarre in the animal kingdom. Moreover, reproductive traits are often species-specific, suggesting that they evolved very rapidly. This diversity, long the province of taxonomists, has recently attracted broader interest from evolutionary biologists, especially those interested in sexual selection and the evolution of reproductive strategies.Primary sexual characters were long assumed to be the product of natural selection, exclusively. A recent alternative suggests that sexual selection explains much of the diversity of ¨primary¨ sexual characters. A third approach to the evolution of reproductive interactions after copulation or insemination has been to consider the process one of sexual conflict. That is, the reproductive processes of a species may reflect, as does the mating system, evolution acting on males and on females, but in different directions.In this volume, authors explore a wide variety of primary sexual characters and selective pressures that have shaped them, from natural selection for offspring survival to species-isolating mechanisms, sperm competition, cryptic female choice and sexual arms races. Exploring diverse reproductive adaptations from a theoretical and practical perspective, The Evolution of Primary Sexual Characters will provide an unparalleled overview of sexual diversity in many taxa and an introduction to the issues in sexual selection that are changing our view of sexual processes.

The Oxford Reading Tree Green Sparks series explains and illustrates the 17 UN Sustainable Development Goals in an age-appropriate way. The series supports development of all reading skills by combining phonic progression with essential vocabulary, as well as extending the reader's comprehension of the issues around sustainability in global and local contexts. This will boost general knowledge and subject-specific vocabulary, as well as promote learner engagementand student wellbeing. The 42 levelled fiction and non-fiction books from Oxford Reading Levels 1 to 6 are linked to subjects in the wider curriculum, as well as to international curricula, such as theOxford International Curriculum and the IB's Primary Years Programme. The Teacher Handbook includes cross-curricular activities designed to support children's understanding of the SDGs. Selected titles from this series can be accessed through the Oxford Owl eBook Library subscription. Free Teaching Notes are also available on Oxford Owl. The Oxford Reading Tree Green Sparks series will inspire young readers to become the problem-solving global citizens of tomorrow. Oxford Reading Tree Green Sparks Level 2: Pack of 6 contains: Level 2: We Did It! Level 2: Get the Bag! Level 2: Fill the pot Level 2: Lots ofFun! Level 2: Fix It! Level 2: The Pod