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how does the presence of exoskeleton explain the general small size of arthropodsas they have exoskeleton and periodic ecdysis the growth of
how do arthropods growbecause of the presence of exoskeleton the growth of an arthropod is periodical during the growth period the animal loses the
what is the external rigid carapace of arthropods called of which substance is it made which type of organic molecule is that substancethe external
what are the classes into which the phylum arthropoda is divided what are the three main ones and some of their representative speciesthe three major
what is the clitellum of earthtworms and where it is locatedthe clitellum is a special region of the annelid constituted by rings metameres with
how is the nervous system characterized in beings of the phylum annelida how can one compare cephalization in annelids to cephalization in nematodes
how can the excretory system of annelids be describedin each segment metamere of the being a pair of complete excretory structures called
how can the presence localization and function of muscular tissue in beings of the phylum annelida be explainedin these beings there are a
is there a respiratory pigment in the annelid bloodthe blood in beings of the phylum annelida have the respiratory pigment hemoglobin the similar
how is the respiratory system of beings of the phylum annelida characterized respiration in annelids can be cutaneous or branchial cutaneous
which are the characteristics and organs of the digestive system of earthworms related to the type of diet of these animalsearthworms eat decomposing
what is the morphological characteristic that evolutionarily approximates the beings of the phylum annelida to arthropodsthe metameric feature ie the
what is the main evolutionary novelty presented by annelidsthe main evolutionary novelty shown by the beings of the phylum annelida is the coelom the
what is the type of reproduction that occurs in roundworms what typical element do nematode sperm cells have nematodes reproduce sexually the
how is the nervous system of nematodes organized where are the neural chords located in their body roundworms have a ganglial nervous system with an
how does the excretory system of nematodes workthe metabolic residuals of nematodes are collected by two longitudinal lateral excretory channels that
compared to platyhelminthes which physiological problem have the cylindrical body of nematodes brought how was that problem solvedthe cylindrical
what is the main evolutionary innovation presented by nematodes what is the advantage of that innovationthe short evolutionary innovation of
are nematodes diploblastic or triploblastic animals just like platyhelminthes nematodes are triploblastics ie they show three germ layers ectoderm
what are the morphological similarities and differences among nematodes and annelids nematodes like annelids have a cylindrical elongated body
what is the typical morphological feature of nematodes that differentiates them from platyhelminthesnematodes are also called as roundworms as the
are nematodes exclusively parasites there are parasitic roundworms containing parasites of plants but there are also free-living
what are examples of nematodesascaris hookworm and filaria all parasites of humans are instance of nematodes also called as
is it possible for a hermaphrodite species to present cross-fecundationthere are hermaphrodite species of animals and plants that present
how can asexual reproduction in planarias be describedplanarias can separate themselves asexually by transversal bipartition because of the great