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which is the type of nitrogen waste eliminated by beings of the class reptiliathese beings excrete mainly uric acid this substance is less toxic than
how is the circulatory system of reptiles characterized what is the basic difference among the reptile and the amphibian heartthe circulatory system
do beings of the class reptilia perform gas exchange in the same way amphibians do these beings do not have permeable skin so they do not make
compared to amphibians what is an example of evolutionary novelty present in beings of the class reptilia against the loss of water through the skin
which is the vertebrate class that is considered the first entirely terrestrialthe first totally terrrestrial vertebrate class totally independent
what are the problems that vertebrates required to solve to adapt to the terrestrial environment as they came from the aquatic habitat how evolution
why is the occurrence of eyelids in amphibians in comparison to their absence in fishes and adaptation to terrestrial lifeeyelids associated to
is fecundation in amphibians external or internal in this aspect are amphibians evolutionarily proximal to fishes or to reptiles in the majority of
how different is the amphibian heart from the fish heartthe fish heart has only two chambers a ventricle and an atrium and the blood that comes to it
how different are the respiration in fishes and the respiration in adult amphibiansin fishes gas exchange is completed by direct contact of water
how different are fecundation in osteichthyes and in chondrichthyesin chondrichthyes fecundation is internal by means of copulation in osteichthyes
what are the lateral lines of fishesthe lateral lines of bony fishes are sense organs that extend along both sides of the animal body they make
how is excretion done in fishes fishes have a pair of kidneys that filtrate the blood bony fishes excrete nitrogen as ammonia nh3 they are
do fishes there an open or closed circulatory system how many chambers does a fish heart have how does blood flow all through the fish bodyas in
how does the swim bladder of fishes work allowing fishes to control their depth under waterfrom hydrostatics it is called that an object does not
how dissimilar are the swimming strategies in osteichthyes and in chondrichthyes why do sharks need to agitate their body to swim while bony fishes
comparing to cyclostomes primitive vertebrates what are the main novelties presented by fishescompared to cyclostomes evolutionary novelties shown by
what are the major features of fishes associated to the habitat where they livefishes are all aquatic animals and therefore they have a hydrodynamic
what are the two main classes into which fishes are dividedfishes are separated into two main classes chondrichthyes fishes with cartilaginous
what are the six criteria used to build a complete evolutionary branch of vertebratesdichotomy in each of the six following criteria builds the
into which subphyla are the protochordates divided what are some representatives of each protochordate subphylumurochordates or tunicates and
what is the group of the phylum chordata that first colonized the terrestrial environment from which habitat did they comeamphibians partially
what is the destination of the branchial clefts in humansin humans the branchial clefts situated in the anterior region of the pharynx also called as
normal 0 false false false en-in x-none x-none microsoftinternetexplorer4 what are the two main subdivisions of the
do echinoderms present internal or external fecundation is there sex division among individualsthe fecundation in echinoderms is external gametes are