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A large number of important drugs are derived from plants. For example Tubocuranin, derived from plant-based curare, is used as a muscle relaxant during surgery.
Curianol, a Guyanes fish poison is used in heart operations. It has also identified that over 1,400 tropical forest plants contain substances that can fight cancer.
The Rosy Periwinkle Catharanthus roseus, has been used for generations by tribal medicinal healers in Madagascar which is its country of origin.
Digitoxin, the most widely used cardiac stimulant is obtained directly from the foxglove Digitalis
Antibiotics such as penicillin are extracted from fungi and from such unlikely sources as the African clawed frog's skin.
a) What is biological magnification? b) Describe how DDT as a water pollutant undergoes biological magnification?
All plants and animals have a natural microflora associated with them. For example, the plants have a natural microflora associated with the surface of roots, stems, leaves e
E mb ryonic stem cells (ES): These are pleuripotent cells of early embryo (blastocyst) capable of giving rise to all differentiated cells, including germ line cells. Em
Pulmonary edema is life-threatening condition and therefore, treated as a medical emergency. As is the case with chronic stable heart failure, identification and correction of any
Does thermal inversion occur in the winter or in the summer? Pollutant low altitude thermal inversion happens in the winter. In this period of the year the sun heats the soil l
Q. In chemical terms how is the neuronal repolarization achieved? Repolarization is the return of the membrane probable from the action potential (+35 mV) to the resting potent
Exudate gums Most exudates gums come from compounds produced when the plant is wounded and these substances seal the wound. Most widely used exudate gum is 'gum Arabic' exuded
What is the root cap? The root cap is a protective structure located in the tip of the growing root. It protects the meristematic tissue of the root forming a cap that surround
Phylum Myxornycetes 1) They are known as cellular slime moulds mostly grow in damp places e.g. soil and rotting tree trunks. 2) They have a curious life-cycle in which free
Q. How is excretion done in amphibians? Adult amphibians have kidneys that filter blood. Nitrogen waste is excreted as urea so amphibians are ureotelic beings. The aquatic, lar
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