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what do you understand by serial homologymetamerization results in a linear series of segments which share a common embryonic origin ancestrally all
what is the meaning of schizogonya form of asexual reproduction found in some protozoans an already multinucleated cell undergoes cell division which
describe schizocoelus and its roleone of two ways that a body cavity forms within mesoderm the other is enterocoelic pouching block of mesoderm
what is schistosomiasis explain in briefa disease cause by the trematode parasite schistosoma found around the world numerous species are responsible
what is the significance of rhynchocoelthe unique body cavity of the nemertean worms which comprise the retractable proboscis there is some debate on
what do you understand by pseudocoelomateanimals that have a body cavity which is not completely lined by mesoderm in past these organisms were
signify the term in details - pseudocoeloma body cavity that isnt completely lined by mesoderm mesoderm is associated with only the ectodermal
express the term in brief - protonephridiaan osmoregulatory-excretory structure found in some invertebrates also known as a flamecell this tubule is
explain prosoma in detailsfirst tagma of a cheliciform consisting of the first six segments of the body appendages on the prosoma are involved in
what is the significance of pronephricthe first or ancestral kidney that appears in the anterior part of the coelomic cavity and is connected to the
what is the meaning of prohaptorthe specialized attachment sucker which surrounds the mouth in monogenean flukes it comrpise adhesive structures
signify the term - proglottidsserially repeating segment like structures found in tapeworms which contain reproductive organs immature proglottids
what do you understand by polypthe sessile asexual stage in the cnidarian life cycle in some species they are independent organisms in others they
what is placoid scale elaborate in detailscales characteristic of cartilaginous fish formed from the dermis scale is anchored in that layer by a
what do you understand by pharynxthe region of digestive tract between the mouth and esophagus in most animals its muscular and forces food into the
what is the significance of pharyngeal gill slitlateral opening in the wall of the pharynx which allows water to enter into the mouth and exit
what is peristomium describethe segment behind the prostomium in annelids which contains the oral opening this segment like the prostomium isnt a
what do you mean by pelvic girdlebones in vertebrates which connect the appendages on left and right side of the posterior appendicular skeleton to
explain pedicellaria in briefdefensive pincerlike structures found on the surface of echinoderms they are capable of responding to external stimuli
signify the term - pectoral girdlebones in vertebrates that connect the appendages on the left and right side of the anterior appendicular skeleton
what do you understand by parapodiapaired lateral unjointed appendages of polychaete worms parapodia have a variety of shapes and their appearance is
what is paedomorphosis explain in briefwhen sexually mature adults have characteristics which would normally be associated with the larval stage it
signify the term - opercular gillthe gill found in bony fish operculum is the outer covering of the gill when its drawn away from the body it pulls
what do you understand by open circulatory systema circulatory system in which circulating fluid blood flows into vessels or tubes not connected to
determine by nutritive muscular cellthe cells which form the gastrodermis lining the inner cavity of cnidarians they carry out two functions first is