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Some activities that make use of biological resources, without involving their extraction or destruction, denote non- extractive use of biological resources. This includes ecotourism, wh ich involves a direct ‘transaction' between people and biological resources and fall into the category of direct use values. However, as it does not involve destruction or a change in the resource - in this case the natural areas visited by tourists - it can be classed as a non-extractive use. Likewise, scientific research in natural areas, bird watching and plant breeding are some other examples of non-extractive use of biodiversity.
Hydrochory - Dispersal of Seeds Plants that grow in or along the bank of water bodies often utilize water as an agency for dissemination of fruits and seeds. Coconut, Cocos nu
Sterilization of Apparatus for Microbiology Experiments : Containers of dangerous biological materials and the doors leading to laboratories or rooms in which work with pathogenic
Define Nutritional Status of the Elderly? Nutritional risk factor is defined as "characteristic or occurrence that increases the likelihood that an individual has or will have
What is the meaning of Darwin's expression "descent with modification"? Descent with modification refers to natural selection. Descent with modification refers to evolutionary chan
Biological Valves : Biological valves are available for all positions. For mitral position they are usually mounted on a stent (stent mounted) whereas for aortic position they ma
A drug has a molec. weight of 200. How many grams would you use to make 100 ml of a solution that is isotonic (for man)? Assume that the diluent is distilled water and that the dru
Nature of Stress - Responses of Plants to Stress As mentioned in the preceding section, stress can be considered as any deviation in environmental condition from optimal for t
Fuel Requirements - Deforestation The increasing demand for fuel wood is one of the major factors leading to the degradation of the forest ecosystem. Fuel wood is of such majo
Female Gametophyte The development of a female gametophyte is initiated with the enlargement of one of the megaspores (usually the one close to the chalaza in a linear tetrad)
who proposed the trinominal nomenclature
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