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Tracheae - Respiration
Insects that have successfully colonised the terrestrial environment have evolved a respiratory system very different from other land animals - the tracheal system. Apart from insects other arthropods, such as millipedes, centipedes, a few arachnids and terrestrial crustaceans have tracheae as respiratory organs.
Simple diffusion Only comparatively small uncharged or hydrophobic molecules (H2O, O2, and CO2, other gases, urea and ethanol) cross the lipid bilayer through simple
What is the cost-benefit relationship regarding sewage treatment as a method to fight water pollution? To treat sewage is much cheaper for society. The non treated sewage pollu
Explain about the Oncogenic Viruses? Certain viruses that interfere with the functions of the regulatory genes have been identified. These viruses are called oncogenic viruses.
Define Gas liquid chromatography? This is used for separating and identifying volatile compounds of fatty acids, hydrocarbons, sterols, amino acids and lipids, even from nanogr
Feline leukemia The disease is caused by a retrovirus and is the most common naturally occurring lymphosarcoma and accounts for nearly 30% of feline tumors. Based on the location
What is the difference between the endocrine gland and the exocrine gland? Endocrine gland is a gland whose secretions (known as hormones) are collected by the blood and reach
Why Ascending Method of Paper Chromatography is Preferred? The ascending method is preferred because of the simplicity of the set up. In actual method the substance to be separ
The secretary coil fills the lumen with a NaCl solution that is isotonic with the blood plasma. As this solution moves upward through the reabsorptive duct, NaCl is reabsorbed into
Q. Etiological factor of lactose intolerance? These diseases are referred to as idiopathic (cause unknown) and though the possible mechanism suggested includes genetic factors,
Determine Water-soluble vitamins needs of school children and adolescents? The suggested requirements are given in Table 15.2 (ICMR 1990). Thiamine is computed as 0.5 mg/1000 K
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