Skip to main content

ANIMAL -KINGDOM-ARACHNIDS.

THE  CLASS   ARACHNID A     INCLUDE  SPIDERS (ORDER ARANEAE) and   Scorpions (order  scorpion-es). The  class   is   a   part  of  the  phylum  Arthropod a ,  which   also  includes  insects and  crustaceans.Spider  and  scorpions   are  characterized    by   having  four   pairs  of   pincers  like   mouth parts  called  chelicerae;another  pair  of  frontal   appendages  called   pedipalps  ,  which  are  sensory  in  Spiders   but  used  for  grasping   in  Scorpions ;and  a  body divided  into  two  sections ( a  combined   head  and  thorax   called  a  cephalothorax  or  prosoma ,   and  a  abdomen    or  opisthosoma)unlike  other  arthropods ,  spider  and  scorpions   lack   antennae  .Spider  and  Scorpions  are   carnivorous .Spiders  poison  prey   by  biting  with  a  fanged   chelicerae,  Scorpions   by  stinging    with  the  end  of   the  metastases (tail).
Spiders  must  shed   their    exoskeleton  (external  skeleton)  to  grow .During   moulting ,  the  exoskeleton  splits  and  the spider  pulls  it self out ,  leaving   behind   the old   exoskeleton
ARACHNIDS. 
 


.

Comments

Post a Comment

Popular posts from this blog

REVOLUTIONS-INDUSTRIAL AND INFORMATION

INDUSTRIAL   REVOLUTION  Starts   in   Europe  particularly  in  England  in  eighteen  century.It   changed  the  whole   of Europe   and   England 's  economy.During  this  period    New    machines  are  invented  in   England   to  speed  up  the    spinning  of  wool  and  cotton .At  first  they  were  powered  by  water  wheels  but  later steam  engines   are  developed.Iron   become  cheaper  and  stronger  as  Iron  making  techniques   improved.Canals  are  dug  to  carry   coal   from  the  mines and  to  transport  finished  goods.After ...
Post a Comment
Read more

WEB SITES TO ENTERTAIN YOU

If  you   get  bored   from  the   web  viewing  the  same  stuff    over  and  over  again -social media  ,blogs,   news  etc  then  you  certainly   need  some  thing  different  that  can  soothe   your  soul and  give  you some  kind of entertainment  then  here  are some  sites  that  can  solve  your  purpose. Bored Panda   Bored Panda is the place you want to be when you want to discover interesting and visually appealing content. It's a blog that publishes regular updates on the coolest finds in travel, photography, illustration, animals, DIY, technology, design and all sorts of other great categories. You can also create an account to vote posts up or down. Brain Pickings .     ...
Post a Comment
Read more

KEY BOARD SHORT CUTS

While   surfing  the Web,  these commands  could  help  you  and  are absolutely worth learning. By making repetitive motions faster, web surfing becomes so easy  and    pleasant! The following shortcuts can  be   work with desktop versions of Chrome, Firefox, and IE. CTRL-T to launch a new browser tab page. Tabbed pages are very useful: they let you open multiple web pages simultaneously without the same memory load as a full browser window.  Simply press CTRL-T to launch a new tab. Related: use CTRL-Page Up and CTRL-Page Down to navigate between the tabs.  CTRL-Enter to type 'www.' and '.com' Once you ...
Post a Comment
Read more