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Escherichia coli is generally regarded as part of the normal flora of the human intestinal tract and that of many animals. Serotypes of E. coli which have been implicated in human diarrhoeal diseases or food poisoning outbreaks and have been designated enteropathogenic E. coli (EEC). They grow over a wide range of temperatures, 20-40ºC with a minimum growth temperature at 10ºC and an optimum at 37ºC. Heating at 65ºC for 15-20 minutes is lethal. The pH range for growth is 4.2-8.50, with an optimum in the range of pH 7.2-7.5. E. coli will grow in the presence of 5.0% salt at 37ºC but 10% is inhibitory.
What is the climax stage of an ecological succession? The climax stage is the stage of the ecological succession in which the community of an ecosystem becomes stable and does
Considering hybridization in a trait like the color of the flowers of a given plant species (red/yellow) conditioned by a pair of different alleles in relation to complete dominanc
Q. What are melanocytes? Melanocytes are epithelial cells of the skin specialized in secretion of melanin and Melanin is a pigment that besides coloring the iris of the eye and
a) Name two food additives needed to keep food wholesome, and say what they do. b) Name two food additives (or types of additive) which are not necessary for keeping fo
Define important aspects of nutritional needs during emergency situations? This unit discussed important aspects of nutritional needs during emergency situations and under envi
In a word, what process provides the energy for muscle contraction
Q. Define Dissection of the Aorta ? The CXR may be abnormal in upto 80 per cent of patients. The abnormalities include: i) Widened mediastinum: This is defined as a mediast
Cellular Transport Cellular transports demote to the movement of compounds across the outer wall or membrane of the cell. This transport is critical in two respects. Firstly, t
HEREDITY 1. Like begets like i.e; every living organism reproduces its own kind. Frog reproduce frogs, rats reproduce rats only. 2. Heredity includes the cha
Q. What is the parasite that causes toxoplasmosis? How is the disease transmitted and what are its typical manifestations? The Toxoplasmosis is caused by the protozoan Toxoplas
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