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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.
Composition The present day composition of atmosphere is the product of a lengthy evolutionary process that began more than four billion years ago. It is composed of a mixture
Suppose you were breeding rabbits and wanted to design an experiment to see if a new type of food would help your rabbits have fluffier fur. How would you treat the rabbits in the
Explain Cooperative behaviours of social animal group Group living, specialist roles, eg bees, ants Altruism, eg social insects, meerkats Group defence, eg social
Define Efficiency - terminologies used in chromatography? Efficiency in chromatography is expressed as number of theoretical plates. H = L/N Where, H is heigh
How Vitamin E is directly related to selenium and PUFA? Selenium: An inter-relationship exists between vitamin E and selenium, as selenium functions as an integral par1
The diet prescription The diet prescription designates the type, amount and frequency of feeding based on an individual's disease process and disease management goals. The dis
Consider an ecosystem consisting of a prey and a predator. If H is the density of prey, P is the density of predator, r is the intrinsic rate of prey population enhance and q is th
Drug Intolerance For patients who cannot tolerate rifampin, alternative regimens include 9-12 months of isoniazid, ethambutol and pyrazinamide, with or without a fluoroquinolo
using an example in each case,describe the three main feeding methods used by animals based on the type of food available
Q. What are the consequences of shifting the chemical equilibrium of the formation of bicarbonate from carbon dioxide and water towards the increase of product (bicarbonate) format
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