Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Class Arachnida of Phylum Arthropoda
Body divided into cephalothorax and abdomen. Cephalothorax along with four (4) pairs of legs; abdomen segmented or unsegmented, with or with no appendages.-Respiratory organs are, either tracheae, or book lungs. Excretory organs are Malpighian tubules or coxal glands. Brain bilobed associated to ventral ganglionic mass forming a ring. Eyes simple mostly oviparous, no metamorphosis. Arachnids, the largest of all the chelicerate classes, include some of the common and well-known but diverse forms, like spiders; ticks, mites, scorpions, pseudoscorpions, whip scorpions, harvestmen (daddy longlegs) etc. Arachnids are one of the oldest classes of arthropods, the fossil forms dating back to Silurian period. Most living arachnids are terrestrial. The result of it is that, the epicuticle has became waxy reducing water loss, the book gills became changed into booklungs for use in air and the appendages became better adapted for terrestrial locomotion. The body of arachnids displays three district regions: the prosoma that is unsegmented and covered by a carapace; the mesosoma or preabdomen and the metasoma or postabdomen. Except in scorpions, in other arachnids the two divisions of the abdomen are not conspicuous and the segments are fused. The appendages are generally confined to prosoma and consist of a pair of chelicerae, a pair of pedipalpi and four pairs of walking legs. There are no antennae and mandibles.
What do you Understand by Amphid? Unique to the nematodes, these paired sensory structures are located on the sides of the head. An external pore leads to an inner chamber and
Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4
Which parts of the eye refract ('bend') the light in such a way as to form an image on the retina? The curved surface of the cornea, and the aqueous humour enclosed by it,
complete assignment
Change in nucleus during cleavage
PROVIDE a specific example for epithelial and connective tissues, how the arrangement of cells helps with tissue functioning?
Determine the term - Vascular disorders Normal central nervous system functioning can be affected by a number of vascular problems, because blood-vessel disease or damage can g
Q. What is the special route that lipids follow during digestion? What are chylomicrons? Triglycerides emulsified by the bile within micelles suffer the action of lipases that
PHARYN X - Commom system between digestive system and respiratory system. In it gullet and glottis present.Gullet leads to oesophagus. Glottis lead to trachea. Wall of p
What are the attribute of amylase inhibitors? This has been attributed to a number of reasons, Let us see how these inhibitors act. The inhibitor forms a complex with amylase,
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd