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Metamerism in annelida in +3 student zoology paper

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ยท    Prof.- Dr ramakant pradhan  best of luck for your exam , you study and ask u doubt or other wise dout in other long question in biology ask me in comment box .ok  student by .  METAMERISM IN ANNELIDA   -     In some animals body is divided into a series of compoctment one behied the other. -    These componets are called segment. -        The inner arrengment of segment is called metamerism . CHARECTERSTICS OF METAMERISM -        In metamerism each segment is the mirror image of other segment. -       Each segment contain nepharidia , blood vessels ,reprodactive organ ,nerve and muscle. -       The segment mark in coporation with all orther segment. TYPES OF METAMERISM . A. True metamerism -        The segment of body is based on segmentation mesoderm. -       It is found is all anne...
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Structure of Peripatus and affinity long question for +3 zoology students

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STRUCTURE   OF PERIPATUS   AND   AFFINITY - Peripatus is a soft bodied worm like , bilaterally symetrical animal. - It shows tracheal mode of respiration. - It is grouped in phylum arthropoda and class onychophora. - Class onychophora inclodes primitive (old) worm like arthropods. - Peripatus connecting like bewteen arhropoda and annelids. - Peripatus seen in neotropical regions like west indies, america, congo and australia etc. - It is the terrestrial animal. - It lives under stones and back ( tree outer layer) of tree and in shady place. - It is nocturnal in habit. ( night standing animal) - During day time it remains in the dark place. - In night time it come out and collect food. - In feeds on small insects , worms etc.   EXTERNAL CHARECTER -It is a soft bodies , worm like animal. - It grows up to 1 to 2 inc length. - The soft body shows deep black colour on the dorsal   side. - The light red colour on the ventral side. ...
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Excretion in annelida long question for +3 zoology students

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EXCRETION    IN ANNILIDA - Excretion is defined as the separetion elimation of nitrogenus west from body to out side. - The organ involve in excretion called as ecretory organ. - In annelida exretion is brought about by these following organ. NEPHRIDIA - These are coild tubules arrenged segmentally drive from ectoderm and projected in the nephridia named as 1. proto-nephridia 2. meta-nrphridia A. PROTONEPHRIDIA - These are primitive type of nephridia open to exterior by an opening called nephridiapore. - Internaly it   blindly open towords coelom and are branched. - Each branch ends in a tubular cell ,   called solencytes. - It is a cavity surrounded by cytoplasm mass. - Flagellum arises from the mass of cytoplasm. - It is found in alcepa. B. METANEPHRIDIA - It has two opening ,one end is open to the coelom by funnel like structure called nephrostome. - And orther end open to anterior by nephridiapore,found in nereis. - Nep...
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