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Algal or Planktonic Fish Poisonings: Fish poisoning can result from the ingestion of fish or shellfish that have fed upon algae toxic to human beings. Paralytic shellfish poisoning is caused by ingestion of shellfish such as scallops, clams and mussels, which have consumed toxic dinoflagellates. Symptoms appear within 10min after ingestion and include gastrointestinal distress, parasthesia of the lips and fingertips followed by ataxia, muscular non-coordination and ascending paralysis. Death may occur within 2 to 12 hours from cardiovascular collapse or respiratory failure. The human lethal dose of toxin is considered to be 3 to 4 mg.
Q. What is the phenomenon called as "red tide"? Which ambiental harms can it cause? Red tide is a phenomenon that takes place when dinoflagellates algae from the pyrrophyte gro
List three human activities which could cause the loss of a species. Human activities which threaten species with extinction are: (i) hunting of individual species, (ii) over-
Q. What are branchiae? What are examples of animals that "breath" through branchiae? Branchiae also known as gills are small portions of richly vascularized tissues external or
Budding - Types of Asexual Reproduction In reproduction through budding, small groups of cells form buds in some part or parts of the parent animal. The bud grows, differentia
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Epilimnion - Summer Stratification This forms the upper layer of the lake and consists of freely- circulating warm water which is well lighted though poor in nutrients. Most o
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· If we are in dangerous areas, water, gas and electricity should be turned off quickly and we should move to a higher level of ground. · It s
Q. Define Accuracy of Stress Echocardiography? The accuracy of stress echo tests for the detection of coronary artery disease is expressed as the sensitivity and specificity of
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