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how different are reptiles and birds concerning the maintenance of body temperature are birds rare in polar regionsreptiles are heterothermic ie they
what are the predominating chemical compounds respectively in eggshell white and yolkthe eggshell is essentially made of calcium carbonate the white
how do birds reproducebirds like each vertebrate have sexual reproduction their embryos develop within shelled eggs having extraembryonic membranes
what similarities do birds and reptiles share regarding external coverage reproduction and excretion regarding external coverage birds are same to
which is the type of nitrogen waste birds produce why does this feature besides being an adaptation to the terrestrial environment also mean an
how is the circulatory system of birds characterizedbirds as every vertebrate have a closed circulatory system the heart is same to the mammalian
what is an example of a hypothesis which may explain why there is not a big representation of the class reptilia found in polar regionsbeings of the
concerning the maintenance of body temperature how do beings of the class reptilia classifylike fishes and amphibians beings of the class reptilia
compared to amphibians what are the two reproductive novelties of beings of the class reptilia for the survival in dry environmentscompared to
how is reproduction done in beings of the class reptiliathese beings reproduce sexually by internal fecundation by means of copulation among male and
how has the importance of the brain evolved from fishes to reptilesfrom the least to the most difficult brain structure it is evident that the brain
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