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is the nervous system in platyhelminthes more or less sophisticated than in cnidarians what are the main neural structures found in flatworms how is
poriferans and cnidarians do not have excretory systems do platyhelminthes have an excretory systemplatyhelminthes have a primitive excretory system
how is gas exchange done in flatwormsplatyhelminthes exchange gases exclusively by diffusion by their body surface this is only possible because all
what are the types of digestion and of digestive system of platyhelminthesflatworms have incomplete digestive systems and they show intracellular and
what is the main external morphological feature that differentiates platyhelminthes from other worms nematodesplatyhelminthes are also called as
what are the best known representatives of the platyhelminth phylumthe most popular representatives of the platyhelminthes are worms that cause human
what does radial symmetry mean what is the type of symmetry found in chordates which are other phyla of the animal kingdom that present species with
what are the main classes into which the phylum is divided what are some examples of each and in which form polyp or medusae are they
what is the name of the larva of corals and sea anemones what is the biological significance of that larval stage sexual reproduction in corals and
in the metagenesis of aurelia and obelia what is the form that produces gametes what is the form that reproduces asexuallyin the metagenesis of some
what is metagenesis what are the other names of this processmetagenesis is the type of life cycle in which there are two dissimilar forms of
what are cnidocytes what is the name of the capsule inside the cnidocyte what are the biological functions of this structurecnidocytes are
what is the type of digestion that occurs in cnidariansthese animals have a digestive cavity and they make intracellular and extracellular digestion
which are the germ layers present in cnidarians which tissues of the animal do they originatethese beings there ectoderm and endoderm two germ layers
concerning tissue complexity how different are cnidarians from poriferanscnidarians have true tissue differentiation they present separate organized
what are the two main morphological patterns of cnidarians concerning locomotion how do these forms differentiate from each othermorphologically
what is the evolutionary advantage of the occurrence of sperm cells and larval stage in the life cycle of spongesthe sexual reproduction in sponges
how are gases exchanged in spongesthe gas exchange in sponges occurs by diffusion from the external to the cells that absorb molecular oxygen and
concerning digestion how are poriferans characterizedsponges are dissimilar from other animals since they present only intracellular digestionthey do
what are the main cells of which poriferans are madesponges have their outer wall covered by flat cells known as pinacocytes and having pores
how do sponges try to protect themselves against harm from the environment is that method efficient or rudimentarysponges can close their pores to
how does water move inside sponges what is the function of the pores in these animals sponges are filtering beings they make water enter their bodies
what is the typical shape of poriferanssponges have bodies in the type of tubular vases or globes open in the upper extremity they have an internal
what is an evolutionary tree is there a precise evolutionary tree known by science that explains the emergence and origin of every type of living
what are the differences between vertebrates and the other chordatesvertebrates are dissimilar because they have a spinal column vertebral column in