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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.
What is the photoperiod? The Photoperiod is the daily time period of light exposure of a living being and the photoperiod may differ according to the period of the year.
Explain the effect of Deficiency of Copper in Human? Owing to the remarkable homeostatic mechanisms, copper deficiency in humans is rare. However, copper deficiency has been re
Explain the True indications of Endodontic Surgery 1. Failure of non-surgical endo. Re-treatment "persistent lesion" 2. Failure of initial and retreatment will not achieve b
Absorption of lipids Absorption of lipids is quite different from the absorption of monosaccharides and amino acids. Figure shows the process. The free fatty acids, monoglycer
How is the smoothing tendency of cornea functioned? Smoothing tendency: In health and in disease condition the epitheliurm has a strong tendency to smoothen the underlyin
Q. What do you mean by somites? Somites are differentiated portions of mesodermal tissue longitudinally distributed along the embryo and the somites originate the muscle portio
Tell me which statement belongs to either natural selection, genetic drift, or gene flow Can you tell me if I am correct? -Consistently causes a population to become better adapted
Using a Tissue Punch The implant heads are located and using a suitable sized tissue punch(depending on the implant diameter), the tissue punch is used and takes a circular pie
Research Priorities for Effective Utilization of Agro- Industrial By- Products Biotechnology including recombinant DNA techniques provides for genetic modifications in plants a
Give an example of how two organisms are interdependent.
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