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Tlie phylum Cnidaria or Coelenterata, includes the faliiiliar hydras, jelly fishes, sea anemones and corals. You have olreacly studied about Cnidarialis in Units 4 and 7 of LSE-09 course. These are often brilliantly colourcd. They exhibit radial symnietry, The Cnidarians possess two basic metazoall structural features. Onc, there is an intenla1 space for digestion, called in Cnidarinns as gastrovascular cavity. This cavity lies along the polar axis of the animal atid opens to tlie outside at one end to for111 noutli, Tlie presence of a mouth a~id digestive cavity permits the use of a mucll greater rnlige of food sizes than is possible in tlie protozoarls and sponges. Two, in Clidariails a circle of tentacles, representing exte~lsiolls of the body wall, surrounds tlie ~lioiltli to aid in tlie capture and ingestion of food. Tlie Cnidarian body wall consists of three basic layers: an outer lnycr of cpidennis, nn inner layer of elidoder~nal cells lining Ilie gastrovnscilar cavity, and between these two a layer called mesoglea. The rnesoglea ranges from n tliin, non cellilar membranc to a thick, fibrous, jelly-like, coid lnaterial with or without wanderillg a~noebocytes, A considerable number of different cell types compose tlie epidermis and gastrader~nis, but there is only a limited degree of organ development.
M a r e k ' s disease (MD) It is a lymphopoliferative disease of domestic chicken caused by a herpes virus. Of the known 3 serotypes of MDV, Serotype I includes all the o
Q. How is the sound vibration captured by the tympanum transmitted through the ossicular chain of the middle ear? The acoustic transmission from the middle to the external ear
2. Vaccinations against various childhood diseases have contributed to the entry of women, particularly mothers, into the fulltime workplace. a. Is this statement supported by data
classification of animal vorticella
Q. How are the three major arthropod classes characterized according to the body division? In arachnids and crustaceans the head is fused with the thorax forming the cephalotho
Establishment of Tissue Cultures By now you are familiar with the term "Explants". After a few days in culture the explant becomes slightly rough in texture and its surface g
Q. Explain Microbiology of vegetables? Ans. All of us are well aware that vegetables are grown in soil, which, we already know, are a rnajor support system for the mi
Define the Psychological problems - Effect of Obesity? Obese people may be exposed to ridicule and discrimination in areas like employment, promotions and social interactions.
What is the control center of the cell? The nucleus contains DNA, which having the instructions for all the functions of the body.
When the Balance Sheet column totals don't agree on the first attempt work backward through the process used in preparing the work sheet exclusively take the following steps until
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