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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
what is the role of naupliar eyethe unique eye found in larval stage of the crustacean life cycle this single compound eye is located medially and
describe in detail - nacreous layerthe innermost of the three layers of a mollusc shell it is also referred to as mother-of-pearl it comprises thin
what is molting explain in briefthe periodic shedding of outer body covering of an animal the term is applied to a variety of things including loss
describe the significance of micronucleusone of two types of dimorphic nuclei found in ciliate protozoans the single micronucleus contains only one
what do you understand by metanephridiaan excretory-osmoregulatory organ comprising a ciliated funnel nephrostome connected to tubules that lead to
explain metameric in detaila body plan which consists of a series of identical units metameres repeated down longitudinal axis of the animal every
signify the term metacoelthe last of three coelomic spaces found in tripartate body plan characteristic of deuterostome lineage of animals other
what is metachronal wave describeduring the coordination of the ciliary movement bands or groups of cilia are at different stages of their beating
what is the concept of mesonephricreplaces the pronephros during development and is retained as functional kidney in adult fish and amphibians formed
determine the significance of mesogleathe jellylike layer found between endodermal and ectodermal cell layers of diploblastic organisms it acts as a
what do you understand by mesocoelthe middle of three coelomic spaces found in tripartate body plan characteristic of deuterostome lineage of animals