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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.
S almonella i n f e c tions The term salmonellosis is a used for several Salmonella infections of humans and animals caused by Salmonella Enterica and S. Bong
How could humans be disadvantaged by the extinction of a plant species? The loss of a plant species may deprive humans of any beneficial substances (e.g. drugs) that the specie
Neurosyphilis Symptomatic neurosyphilis, including ophthalmic or otic infection, requires treatment with high doses of aqueous penicillin G IV or procaine penicillin G IM with
How are grasslands classified? The Grasslands may be classified into steppes and savannahs. In a steppe prevailing vegetation is grass, as in the pampas of South America and in
N A TURA L CONTROL OF POPULATION GROWTH - 1 . Biotic potential - It is capacity of population to increase its number by reproduction. For all animals, it is v
Q. What are the major significant organic molecules for living beings? There are many types of organic molecules that are important for the living beings. Particularly importan
In eukaryotes possibly the most rapid and complex signaling is mediated through nerve impulses. The Nerve cells (neurons) consist of a cell body with numerous projections
Veterinary Science : This is the study of domestic animals. Veterinary science or veterinary medicine is the branch of science which deals with the application of surgical, medical
Benefits of Hand washing You wash hands as a routine in daily life before cooking and eating food, after using wash room/toilet, before touching and caring a new born baby, aft
Chromosome partitioning depends on changes in the polymerization state of bacterial proteins that are functionally analogous to what eukaryotic protein?
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