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comparison between metamorphosis in amphibians and insects you may have realized that the metamorphic process in amphibians and insects show certain
interaction of insect hormones in the process of metamorphosis the organs and the hormones usually included in metamorphosis of insects this is since
prothoracic gland or ptc prothoracic gland ptc or moulting gland and ecdysone or moulting hormonethe 3rd endocrine gland-prothoracic gland- is an
brain neurosecretory cells and their hormones kopec was the very first to suggest the role of hormones in controlling metamorphosis on the base of
external factors - factors controlling metamorphosis in insectsin few cases an external factor may be accountable for initiating moulting as for
which of the following could potentially be a free radical answer oxygen atomic number 8 helium atomic number
complete metamorphosis in all endopterygota insects where wings and other structures develop internally in invaginate imaginal epidermal pockets such
patterns of metamorphosisthe pattern of metamorphosis is not the same in all insects and so metamorphosis can be broadly classified into 3 types1
general process of post-hatching growth in insects while a young insect hatches out from an egg it is covered by a firm inflexible sclerotized
induction in metamorphosis some of the morphogenetic changes throughout metamorphosis are found fo be quite independent of hormone action for
threshold value of different larval tissues threshold value of dissimilar larval tissues for the thyroid hormone concentrationone of the main
competence of larval tissue or multiple responses the responsiveness of different larval tissues to thyroxine is markedly different the tissues of
hormones in metamorphosis of amphibia in amphibians the changes that take place during metamorphosis are brought about by hormonal secretions of the
morphological changesregressive changes-these changes include the gradual reduction and ultimate disappearance of all those larval structures or
metamorphosis in amphibians metamorphosis is radical in anurans slight or not exists in urodeles in anuran amphibians like toads and most frogs
types of metamorphic changes the process of metamorphosis includes reactivation of the morphogenetic processes the morphogenetic changes also the
types of development of animalsdifferent animals have evolved various methods of development these methods can be broadly categorized into two
metamorphosisthe phenomenon of metamorphosis is described as a process during development which involves a remarkable change in morphology and
common features of eye and limb development a comparison of the embryonic development of the very much different organs the eyes and the limb points
role of cell deathas development of the limb proceeds waves of death or necrosis of large masses of mesodermal cells occur in certain regions at
zone of polarizing activity zpathe a-p axis is the 1st axis to be fixed in the presumptive limb mesoderm at a very early stage on the basis of
realization of p-d polarity of limbrealization of p-d polarity of limb expressed in a specified proximo-distal sequence of differentiation of limb
apical ectodermal ridge aerwe have described earlier that the aer persists at the tip until the last phalangeal cartilage begins differentiation the
role of mesoderm and ectoderm in limb morphogenesis a series of very interesting experiments on wing and leg buds of chick embryos have clarified the