Though some metazoans
, such as helminths, are known to carry two functional copies of the 18S gene with differing sequences (Carranza et al.
Molecular clock calibrations and metazoan
parasite infracommunities in five Sciaenidae from the Central Peruvian Coast.
Structural and functional diversification of AHRs during metazoan
Endosymbionts observed on histological examination included Rickettsia-like organisms (RLOs) in the ctenidia (n = 246); an unidentified metazoan
parasite in the siphon epithelium (n = 220); and microsporidia-like species in the intestine (n = 103), siphon muscle (n = 28), and ova (a Steinhausia-Wke parasite; n = 99).
Diversity of metazoan
ovaries and vitellogenic mechanisms-implications for life history theory.
Biologists, zoologists, marine scientists, pathologists, fish health specialists, and other scientists from around the world cover protozoan and metazoan
parasites that cause disease or mortality in economically important fish and discuss their clinical signs, diagnosis, external/internal lesions, pathophysiology, and protective and control strategies.
organisms such as sponges, serpulids and other living creatures dominated the reefs.
This was a stunning discovery because previously it was thought that the urea cycle originated with the metazoan
(animal) branch of life where it has played an important role in facilitating a wide range of physiological innovations in vertebrates.
A sampling of the chapter topics includes the relation between retrotransposons and their metazoan
hosts, endogenous retroviruses, retroviral entry and uncoating, reverse transcription and integration, assembly and release, retroviral restriction factors, and HTLV and HIV.
However, the Ames test is not a suitable model for the mutagenesis of metazoan
cells, and thus may yield false-positive and false-negative results (Ashby and Styles 1978).
The 5th edition of Ash and Orihel's Atlas of Human Parasitology is a superb, up-to-date compendium of protozoan and metazoan