Bøger af Subir Ranjan Kundu

Mitochondrial Eve and Y-Chromosomal Adam discusses theoretical ideas, interpretations, and paleontological evidence to narrate the origin and evolutionary story of Sapiens through the transitional stages of archaic human species involved in the evolutionary pilgrimage, from the great apes and to modern humans. Author Subir Ranjan Kundu investigates the DNA footprints of primates - great apes, archaic humans, and anatomically modern human beings - to stretch out the missing links between evolutionary milestones to define and redefine the progress of life.The origin and evolution of Humans have always remained a source of debate between the creationists and evolutionists, in terms of recognizing the results of such researches on biological evolution and its credible interpretation of the evolutionists who upheld the origin and evolution of "Sapiens" resulting from great apes in course of the gradual evolutionary progress of life. Kundu analyzes interpretations of molecular and evolutionary geneticists over the last four decades and presents detailed illustrations on the matrilineal inheritance of mitochondrial DNA (represented by mitochondrial Eve as primordial mother), patrilineal inheritance of Y-chromosomal DNA (represented by Y-chromosomal Adam as primordial father). He also presents elaborate structural aspects of the human genome and molecular aspects of the DNA footprint of Sapiens. This book is addressed to heterogeneous readers, graduate, and post-graduate students, research scientists and the general public interested in the origins and biological evolution of humans in view of molecular phylogenetics.

The contemporary literature deals with a taxonomic review of this systematically complex, unigeneric family with special reference to disjunctive distribution, phytoendemism (which is 50%), biogeography, economic potential, survival threat etc. Like any experiments as well as changes in laboratory or society, there are two phases recognized as ¿Pre¿ and ¿Post¿ phases marked by form of changes, peony has gone through a huge changes in terms of morphology, cytology habit etc. before and after glaciations of Pleistocene era, popularly known as Ice Age 2 which has huge impact on biogeography, paleoecology of the world flora and fauna, e.g. mass extinction as well as confinement of a big number of animals and plants; evolution of herbaceous habit in place of predominant arborescent habit etc. The present study is a sincere effort to follow the footsteps of peonies, went through adverse palaeo-climatic threats of survival, migration, complex reticulate evolution, natural hybridization, anthropogenic exploitation for ornamental and medicinal potential and practices for fifteen hundred years. It is an earnest endeavor to narrate the history of domestication of peony, traverse a long time.

Exploring Genome's Junkyard: In the Labyrinth of Evolution narrates the progress of biological evolution, beginning with the conceptual introspection of gene and continuing with the contemporary understanding of the structural and function aspects of the human genome. Recent advances in human genome research have led scientists to the term "biological dark matter," which refers to genetic material whose functionalities are not yet properly understood. Such "dark matter" has been recognized as non-coding, or "junk DNA," and non-coding RNA, which was thought to be devoid of protein encrypting potential but contained 98-99% of the human genome. The mysteries of missing genes from its "Dark DNA" region are a hotbed of recurrent mutations. Hence, the presence of "missing genes" in evolutionary sibling species has indicated that the "missing genes" are not really missing but rather hidden in the mutational hotbeds of "Dark DNA" where they have steered the continuation of life's evolutionary journey.

Spider Evolution: Genetics, Behavior, and Ecological Influences provides a thorough exploration of the evolutionary trail of arachnids, particularly spider species, from prehistoric origins to current sustainability issues. This book analyzes extinct organisms in the Arachnida class, specifically looking at their phylogenomics and molecular footprints to understand evolutionary changes in diversification in today¿s species. Sections cover spider origins and their influences on behavioral traits, physiology of sensory organs, and biomechanics, also touching on spiders as prey and predators and how their roles have changed in the 400 million years of Arachnida existence. The book then focuses upon current environmental issues facing spider species and how these have, and can, affect the evolution of these organisms. Topics include biodiversity minimization, climate change and natural disasters. This book is a much-needed resource for entomologists and arachnid- or arthropod-driven researchers. Advanced undergraduate and graduate students will also benefit from the historic review, current assessment and future predictions of spider evolution provided in this book.