منابع مشابه
Sponges
reference taxon for studying metazoan origins. Like a living time capsule, they may allow us to infer the genome content and cell biology of the unicellular progenitors of Metazoa. For example, comparing choanoflagellate and metazoan genomes will reveal the minimal genetic toolkit of the first metazoan. Pilot studies of choanoflagellate expressed genes have already uncovered homologs of a remar...
متن کاملGraft Rejection in Sponges
Graft rejection frequencies in a population of the sponge Ectyoplasia ferox are reported in relation ta the complexity of the histocompatibility system in this species. The frequency of graft acceptance is high but we show that, despite assumptions in the literature to the contrary, this does not imply that sponges accepting each other’s grafts are genetically identical. This paper reports that...
متن کاملMicroorganisms in Kitchen Sponges
In this study presence of various kinds of microorganisms in kitchen sponges were studied. Additionally effects of regular dish washing liquid on Escherichia coli ATCC 8739 and Salmonella typhimurium ATCC 13311 were investigated under laboratory conditions in kitchen sponges with or without food residue. The sponges involved in daily use in households were samples were analysed for the presence...
متن کاملSuper sponges.
The localisation of tumour deposits by a 131 1 labelled monoclonal antibody to carcinoembryonic antigen (CEA) has been evaluated in 24 patients with primary gastric, oesophageal and colorectal cancer and in 26 patients with clinically suspected recurrent gastric and colorectal cancer. Seventeen of 20 primary sites and 6/15 associated secondary sites were correctly identified by external scannin...
متن کاملEpithelia and integration in sponges.
An epithelium is important for integrity, homeostasis, communication and co-ordination, and its development must have been a fundamental step in the evolution of modern metazoan body plans. Sponges are metazoans that are often said to lack a true epithelium. We assess the properties of epithelia, and review the history of studies on sponge epithelia, focusing on their homology to bilaterian epi...
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ژورنال
عنوان ژورنال: Annals and Magazine of Natural History
سال: 1878
ISSN: 0374-5481
DOI: 10.1080/00222937808682449