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Metamerism in annelida in +3 student zoology paper

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·    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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Respiration in mollusca , long qustion answer in simple word in +3 zoology students.

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↞RESPIRATION    IN    MOLLUSCA - Mollusce is a large phylum of invertebrate animal. - Mollusca are the largest marine phylum about 23% of all merine organism .               The respiration bring about the utilization of O 2 whitin the body                  and given out of CO 2 outside. - Respiretory organ in mullusca, these are, CTENIDIA - Ctenidia are the organs of aquatic respiratory and   it is present in aquatic mollusca. - The pulmonary chamber is the organ of aerial respiration and is present in terrestrial mollusca. - But in certain cases in pila , planorbis etc, both methords of respiration are used . - It is simplest methord in mollusca. - Ctenidia respiration through skin.   STRUCTURE   OF   CTENIDIA - The ctenidium has a cintrol axis one or two rows of f...
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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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