Exam Board: Salters Nuffield Level: A level Subject: Science / Biology First teaching: September 2015 First exams: June 2017 An ActiveBook is included with every Student Book, giving your students easy online access to the content in the Student Book. They can make it their own with notes, highlights and links to their wider reading. Perfect for supporting revision activities. Student Book 1 supports a standalone AS course and provides the first year of a two-year A level course; Student Books 1and 2 together support the full A level course. A cumulative approach to learning constantly builds on what has previously been learnt. Each topic is introduced within a wider context. Concepts are revisited and developed in later topics. Integrated math sand stats support directs students to online maths resources. Thinking Bigger spreads require students to use knowledge in new contexts and think about connections and develop essential assessment skills throughout course. Real-life articles engage students with current biological writing and develop scientific literacy skills needed for A level and beyond. Checkpoints consolidate knowledge through summarizing tasks Practical activities provide opportunities for students to practise their skills and develop understanding of practical requirements. Material has been updated to reflect revisions, additions and deletions to changes in the subject content.

Protect crop yields and strengthen ecosystems with this essential guide Research into weed management is an increasingly critical component of both environmental stewardship and food production. The potential cost of weed propagation can be measured in crop yield reductions, under-nourished populations, stymied economies, and more. The propagation of herbicide-resistant weed populations means that purely chemical weed management is no longer viable; food production can now be secured only with an ecological approach to weed control. Ecologically-Based Weed Management details such approaches and their potential to manage weeds across a range of agricultural and environmental contexts. It emphasizes the deployment of ecological principles to prevent weed infestations, reduce crop losses, and strengthen ecosystems. In a time when growing population and changing climates are placing enormous pressure on global food production, this approach to weed management has never been more vital. Ecologically-Based Weed Management readers will also find: A global team of expert contributors to a multidisciplinary approach Detailed discussion of topics like herbicide limitation, integrated weed management, and more Insights pertinent to agriculture, academia, government, industry, and more Ecologically-Based Weed Management is ideal for researchers in agriculture chemistry, weed science, agronomy, ecology, and related fields, as well as for regulators and advanced students.

Two distinguished scientists encouraged Warwick Collins in writing his revolutionary theory of evolution. Professor Freeman Dyson, one of the world's leading theoretical physicists, wrote, "I like your theory, and think it has a good chance of being right."He added, "Darwin would have liked your theory." Professor Donald Braben, a nuclear physicist who directed a series of wide-ranging research programs at BP, responded, "Hierarchically speaking, variation is of greater significance than selection. I agree, therefore, that if silent gene theory were proved correct, it would be the more complete theory, as Einstein's is compared with Newton's."Charles Darwin wrote in The Origin of Species that ..". unless profitable variations do occur, natural selection can do nothing." As Darwin recognized, natural selection, far from increasing variation within species, reduces variation constantly in favor of an optimum type. What then is the true source of variation in evolutionary systems? It is a question which has obsessed Warwick Collins, a novelist who had studied biology at university, for much of his adult life.He proposed in March 2000 that the required degree of variation could be achieved if large numbers of inert or silent genes existed within the genome. Such genes, because they do not code for physical characteristics, could freely mutate over time without deleteriously affecting the host organism. At a later stage they could be switched on, by largely random processes, and generate exotic new variants. Remarkably, his description of silent genes was found to correspond precisely with the so-called junk genes. These are found in all species, forming the great majority of genes in multicellular species and rising to 98.5% of the genome in humans. Until then their function had proved mysterious. In addition, Collins's theory predicted a number of features of the silent or junk genes which have since been increasingly verified by recent research: for example, that they could become active and begin to code, and that they influenced other genes.It is now widely accepted that, just as Collins predicted, the vast majority of significant mutation in the genomes of complex species arises from the silent genes. But Collins's powerful and ambitious theory moves well beyond the molecular realm. He argues that while natural selection is a major force in evolution, it is primarily negative and entropic. Instead, the great driver of complex evolution is the range of variation created by the silent genes. As Professor Donald Braben writes in his illuminating foreword, "Collins is proposing a general evolutionary theory which, if it continues to be supported by the data, may in due course come to rival Darwin's theory that evolution is driven by natural selection."

Sedert die tweede druk van die tweede uitgawe in 1975 was Die siel van die mier egter slegs as ’n skaars tweedehandse eksemplaar beskikbaar. Hierdie uitgawe is verryk deur ’n inleidende besinning oor die vraag of Maeterlinck, die Belgiese Nobelpryswenner, Marais se teorie oor die termietnes as organiese eenheid oorgeneem het. Origens blyk dit uit die verskillende drukke en uitgawes hoe Afrikaans in die jare twintig van die twintigste eeu nog op weg was om ’n wetenskaplike woordeskat te vind en die addendum bevat artikels wat vandag slegs met moeite uit ou tydskrifte en koerante opgediep kan word.

Titus Lucretius Carus was probably born in the early first century B.C., and died in the year 55. Little is known of his life, although two tantalizing bits of gossip were passed on by St. Jerome: that he was poisoned by a madness-inducing aphrodisiac given him by his wife, and that his great poem "On the Nature of Things" was posthumously edited by Cicero. For the latter assertion, writes Anthony Esolen in his introduction to the present volume, there is little evidence, and none whatsoever for the former.

What does survive is a masterful poetic work that stands as the greatest exposition of Epicurean philosophy. Writing in the waning days of the Roman Republic--as Rome's politics grew individualistic and treacherous, its high-life wanton, its piety introspective and morbid--Lucretius sets forth a rational and materialistic view of the world which offers a retreat into a quiet community of wisdom and friendship.

Even to modern readers, the sweep of Lucretius's observations is remarkable. A careful observer of nature, he writes with an innocent curiosity into how things are put together--from the oceans, lands, and stars to a mound of poppy seeds, from the "applause" of a rooster's wings to the human mind and soul. Yet Lucretius is no romantic. Nature is what it is--fascinating, purposeless, beautiful, deadly. Once we understand this, we free ourselves of superstitious fears, becoming as human and as godlike as we can be. The poem, then, is about the universe and how human beings ought to live in it. Epicurean physics and morality converge.

Until now, there has been no adequate English verse translation of Lucretius's work. Anthony Esolen fills that gap with a version that reproduces--with remarkable faithfulness--the meaning, pace, and tone of the original Latin.

Here is a book that will introduce a new generation of readers to a thinker whose powers of observation and depth of insight remain fresh to the present day.

"Esolen has the rare gift of being both a fine poet and a lover of languages. His diction is poetic and natural; he has a fine ear for sound, and the translation benefits greatly from being read aloud--as Latin poetry was meant to be. This translation is clear and forceful. It can, and will, be read."--Kenneth J. Reckford, University of North Carolina, Chapel Hill

Support students through the AQA A-level Biology specification with this write-in workbook, providing extra guidance, practice and scaffolding to reinforce understanding and improve key skills. -Develop and consolidate understanding using the practice questions to check knowledge -Build key skills and practise the different question types with maths, practical-based and synoptic questions -Support assessment preparation using exam-style questions that get progressively more difficult -Use flexibly alongside your existing textbooks and schemes of work as homework, classwork and for intervention -Enable students to mark work independently with answers and worked solutions available online This book for AQA A-level Biology Year 2 covers: Energy transfers in and between organisms; Organisms respond to changes in their internal and external environments; Genetics, populations, evolution and ecosystems; The control of gene expression.

Teach students to view their world using scientific reasoning with Campbell Essential Biology with Physiology. The authors' approach equips your students to become better informed citizens, relate concepts from class to their everyday lives, and understand and apply real data, making biology relevant and meaningful to their world and futures. The new edition incorporates instructor feedback on what key skills to highlight in new Process of Science essays and uses striking infographic figures in conveying real data to help students see and better understand how science actually works. New author-narrated Figure Walkthrough Videos guide students through key biology concepts and processes. A new chapter in learning Pearson eText is an affordable, easy-to-use digital textbook. With Pearson eText, you can access the book anytime, anywhere, using your favourite mobile device, even when offline. You can easily retrieve and review important content using the eText search, bookmarks, highlights, and notes. Some titles also include embedded media and study tools. And you get all of this for a fraction of the cost of a printed text. Learn on the go. Read, practice, and study on any device. Read anytime and anywhere via the Pearson eText mobile app - even offline. Make it your own. Add notes and highlights directly in your eText to study how you'd like. Find what you need. Quickly navigate the content with easy search and bookmark options. Time limit This product is only available for a 12 month subscription period starting from the date of purchase.

The Anthropocene era has been marked by such significant human pressure that it has led to the sixth mass extinction. The Baseline Concept in Biodiversity Conservation interprets human domination of the Earth as the process of gradual landscape change, the execution of which is neither linear nor homogeneous. This book is structured around three key questions: Where and when did everything go wrong? How do we define baseline states for biodiversity conservation strategies? How are reference states mobilized in a concrete way through case studies? Today, biodiversity conservation faces a dilemma that this book sheds light on: return to states less modified by humans than today but in a world that has changed significantly; or, let the nature of tomorrow express itself where it still can but without a road map.