منابع مشابه
Chromosomal changes in vertebrate evolution.
The immense variety of karyotypes found in extant species is unmis takable evidence that the process of evolution is associated with karyo typic change. The question whether the chromosome changes are a cause or a consequence of speciation has been debated intensely for many years and, as is often the case with biological problems, there has been no unequivocal answer. Evolution operates alon...
متن کاملEvolution of Vertebrate Immunity
All multicellular organisms protect themselves against pathogens using sophisticated immune defenses. Functionally interconnected humoral and cellular facilities maintain immune homeostasis in the absence of overt infection and regulate the initiation and termination of immune responses directed against pathogens. Immune responses of invertebrates, such as flies, are innate and usually stereoty...
متن کاملVertebrate Evolution: Turning Heads
The skeleton of the neck and shoulders has undergone alterations during evolution, but muscle connectivity has not. A recent study suggests this is a result of neural crest cells defining attachment points and thus muscle connectivity.
متن کاملEvolution of vertebrate colour vision.
Recent years have witnessed a growing interest in learning how colour vision has evolved. This trend has been fuelled by an enhanced understanding of the nature and extent of colour vision among contemporary species, by a deeper understanding of the paleontological record and by the application of new tools from molecular biology. This review provides an assessment of the progress in understand...
متن کاملEvolution of vertebrate retinal photoreception
Recent findings shed light on the steps underlying the evolution of vertebrate photoreceptors and retina. Vertebrate ciliary photoreceptors are not as wholly distinct from invertebrate rhabdomeric photoreceptors as is sometimes thought. Recent information on the phylogenies of ciliary and rhabdomeric opsins has helped in constructing the likely routes followed during evolution. Clues to the fac...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Evolution
سال: 1978
ISSN: 0014-3820
DOI: 10.1111/j.1558-5646.1978.tb01120.x