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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.
Define about the Ultraviolet rays - carcinogenic? Ultraviolet rays: There is ample evidence from epidemiological studies that ultra violet rays derived from the sun induce an i
What is the relationship between the concept of reproductive isolation and the concept of species? The Reproductive isolation is an important concept because it defines the con
Q. Stress Testing after Myocardial Infraction? Many post infarction deaths are sudden and occur with in the first 6 months after infarction. Exercise testing from 10 days to we
Q. Explain microbiology of water? Ans. Unlike air, natural waters contain their natural flora, as well as, microorganisms from soil and possibly from animals and se
Objectives of Gingival Curettage - Endodontic Surgery a) Provides access and visibility of the apex, b) Removal inflamed tissues, c) Provides biopsy. - It’s advisable
Clostridium botulinum is an anaerobic, Gram-positive, spore forming, rod shaped bacteria that produces the potent neurotoxin. The organism and its spores are widely distributed in
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What happens if platelets aren''t present in blood?
Signify Asexual and how it is formed? Organisms which do not reproduce by recombination of genetic material contained in gametes. There is not any combination of a haploid sper
Problem-solving essay. Maximum 800 words. Deadline 12th of March. Show me you understand what this essay requires
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