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q what is the group of the phylum chordata that first colonized the terrestrial environment from which habitat did they comepartially aquatic
q how can the tubular-dorsal nervous system in chordates be compared to the nervous pattern present in invertebratesin chordates the nervous system
q is the tubular-dorsal nervous system of chordates associated to radial or lateral symmetry how does that explain the complexity level of the
q what is the destination of the notochord in protochordates and in vertebratesin vertebrates the notochord disappears and gives birth to the spinal
q what is the destination of the branchial clefts in humansin humans the branchial clefts located in the anterior region of the pharynx also known as
q what are the three structures shared by every chordate that characterize the groupall beings of the phylum chordata have branchial clefts in the
q echinoderm identity card how are echinoderms characterized according to examples of representing beings basic morphology type of symmetry germ
q what are the classes into which the phylum echinodermata is dividedthe five echinoderm classes are asteroids starfishes ophiuroids crinoids
q is there a larval stage in echinodermsin echinoderms embryonic development is indirect with ciliated
q do echinoderms present external or internal fecundation is there sex division among individualsthe fecundation in echinoderms is external gametes
q how are the nervous and the symmetry system characterized in echinodermsadult echinoderms along with cnidarians are the animals that present radial
q do echinoderms have an excretory system how is excretion done in these animalsechinoderms do not have an excretory system their excretions are
q do echinoderms have circulatory and respiratory systemsin echinoderms there are not well- defined respiratory with the exception of the holothurian
q what is the embryonic characteristic that evolutionarily makes echinoderms proximal to chordateschordates and echinoderms are deuterostomes that is
q what is the kind of digestive system of echinodermsechinoderms present a complete digestive system with anus and mouthq do sea urchins have
q what is the system that permits fixation and movement to echinodermsthe system that permits fixation and movement to substrates in echinoderms is
q how can the endoskeleton of echinoderms be characterized in comparison to analogous structures present in vertebrates arthropods and molluscsthe
q what are the basic morphological features of echinodermsechinoderms as the name indicates derma skin echino spiny are creatures with spines
q under which environments do echinoderms liveechinoderms are marine animals and they live in salt
q what are some representatives of the echinoderm phylumstarfishes sea urchins sea cucumbers holothurians and brittle stars are examples of
q mollusc identity card how are molluscs characterized according to examples of representing beings basic morphology type of symmetry germ layers and
q how are artificial and natural pearls createdpearls are made from small strange particles that deposit between the mantle and the shell of the
q what are examples of the economic and ecological importance of molluscsmolluscs are important players in several food chains in ecosystems many
q how is the nervous system of molluscs organizedmolluscs have well-developed sensory structures it is accepted that cephalopods like squid and
q what is the function of the feet in molluscs how is the mollusc foot related to the name given to the classes of the phylumthe mollusc foot has the