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Reproduction of the original: Studies in Spermatogenesis (Part 1 of 2) by Nettie Maria Stevens
When studying the effects of parasites on natural populations, the avian haematozoa fulfills many of the specifications of an ideal model. Featuring a multitude of tables and illustrations, Avian Malaria Parasites and Other Haemosporidia summarizes more than a century of research on bird haemosporidians. For a long time, bird blood parasites served as important models in studying human diseases. Although now largely replaced, the wealth of data and research remain. With chapters addressing life cycles and morphology, pathogenicity, ultrastructure, geographical distribution, and illustrated keys to all known species of the parasites, this book is a masterful assessment of the biology of bird haemosporidian parasites.
Understanding of the origin of species and their adaptability to new environments is one of the main questions in biology. This is fueled by the ongoing debate on species concepts and facilitated by the availability of an unprecedented large number of genomic resources. Genomes are organized into chromosomes, where significant variations in number and morphology are observed among species due to large-scale structural variants such as inversions, translocations, fusions, and fissions. This genomic reshuffling provides, in the long term, new chromosomal forms on which natural selection can act upon, contributing to the origin of biodiversity. This book contains mainly articles, reviews, and an opinion piece that explore numerous aspects of genome plasticity among taxa that will help in understanding the dynamics of genome composition, the evolutionary relationships between species and, in the long run, speciation.
Presents new insights into speciation through an in-depth analysis of extraordinary chromosomal variation in one species written by leading experts.
This book provides a practical guide to the diagnosis and management of rheumatic disease in geriatric patients. It details information on the effect of ageing on musculoskeletal and immune systems and specifies impact of a variety of inflammatory and degenerative rheumatic disorders on the elderly. The clinical diagnostic approach to an older individual with musculoskeletal complaints is a cornerstone of this book, which includes also insights into the most important comorbidities for this age and discusses in depth available treatments and rehabilitation tools. The symptoms, imaging features and recommendations on the interpretation of specific laboratory tests for rheumatic diseases in ge...
The Genetical Theory of Natural Selection by R.A. Fisher (1930) dictated that sexual dimorphisms may depend upon a single medelian factor. This could be true for some species but his suggestion could not take off the ground as gender in Drosophila is determined by the number of X chromosomes. Technical advances in molecular biology have revived the initial thinking of Fisher and dictate that TDF or SRY genes in humans or Tdy in mice are sex determining genes. The fortuitous findings of XX males and XY female, which are generally termed sex reversal phenomenon, are quite bewildering traits that have caused much amazement concerning the pairing mechanism(s) of the pseudoautosomal regions of hu...
Optical probes, particularly the fluorescent varieties, enable researchers to observe cellular events in real time and with great spatial resolution. Optical Probes in Biology explores the diverse capabilities of these powerful and versatile tools and presents various approaches used to design, develop, and implement them. The book examines the use
Elayn Martin-Gay firmly believes that every student can succeed, and her developmental math textbooks and video resources are motivated by this belief. Basic College Mathematics with Early Integers, Second Edition was written to help students effectively make the transition from arithmetic to algebra. The new edition offers new resources like the Student Organizer and now includes Student Resources in the back of the book to help students on their quest for success.
Indispensable for all plant biologists, this is a fascinating and thorough examination of those factors which affect the sex determination of plant species, describing all of the main classes of plant with unisexual flowers hermaphrodite, monoecious and