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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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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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Reproduction in lichens for +3 zoology students

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REPRODUCTION   IN   LICHENS - Commonly lichens produced by vegetative , asexual and sexual methords of reproduction. A. VEGETATIVE REPRODUCTION a) BY FRAGMENTION - Death and decay of older parts of the thalus produce smaller pieces. - This pieces give rise to new thalus. - In sometime the broken poritin are born in other substrated by wind. - Each flagelats contains algal and fungal or getting a suitable substrated , each portion give rise to a new thallus.   b) BY SOREDIA - It is the most common methord of vegetative reproduction. - Soredia are dispersed by wind sometime they form a massive cating on the thallus called as soredia dust. - Each soredium contain fungal hyphae and algal cell , on getting suitable substratun give rise to new lichen thallus.   c) BY ISIDIA - Isidia are broken off from the parent thallus and dispresed to other substrate. - Each isidium contain fungal and algal componets, so they get suitable...
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