Morphological castes in a vertebrate
نویسندگان
چکیده
منابع مشابه
Morphological castes in a vertebrate.
Morphological specialization for a specific role has, until now, been assumed to be restricted to social invertebrates. Herein we show that complete physical dimorphism has evolved between reproductives and helpers in the eusocial naked mole-rat. Dimorphism is a consequence of the lumbar vertebrae lengthening after the onset of reproduction in females. This is the only known example of morpholo...
متن کاملMorphological classifications of vertebrate blood capillaries.
BENNETT, H. STANLEY, JOHN H. LUFTANDJAMES C.HAMPTON. Morphological class$kations of vertebrate blood capillaries. Am. J. Physiol. Ig6(2): 381-390. I g5g.Morphological features of blood capillaries from various vertebrate forms and organs are presented. Simple classifications are proposed, based on presence or absence of continuous basement membrane, on the nature of the endothelial cell and on ...
متن کاملSpecialization and group size: brain and behavioural correlates of colony size in ants lacking morphological castes.
Group size in both multicellular organisms and animal societies can correlate with the degree of division of labour. For ants, the task specialization hypothesis (TSH) proposes that increased behavioural specialization enabled by larger group size corresponds to anatomical specialization of worker brains. Alternatively, the social brain hypothesis proposes that increased levels of social stimul...
متن کاملScheduled Castes in Andhra Pradesh
History tells us that Scheduled Castes have no history of their own. They have been marginalised as objects of the state rather than being treated as the subjects. 1 They are treated as targets of philanthropic and social work rather than citizens of a nation who have equal rights as other citizen to all the benefits that are given to them as worthy citizens. Instead, they have been pushed arou...
متن کاملEvolution of castes in Polistes
A novel hypothesis for the origin of castes in Polistes has recently been proposed: the worker and gyne castes among offspring of a Polistes colony are based on the underlying ground plan of reproductive physiology that would have characterized the non-diapause and diapause generations of a bivoltine solitary vespid wasp. Here the hypothesis is reviewed in light of the dynamic nature of diapaus...
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: Proceedings of the National Academy of Sciences
سال: 2000
ISSN: 0027-8424,1091-6490
DOI: 10.1073/pnas.97.24.13194