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Q. Anatomy in relation to taxonomy?
The use of anatomical* characters in taxonomy began with the development of the microscope which provided the biologist a new tool to observe the internal structure of organs and tissues. it was realised that anatomicai characters are just as valuable as morphological ones. All parts of a plant provide numerou5 features which have been used for taxonomic purposes. Some anatomical features are very diagnostic and are commonly used in routine identification. We also know that this subject is of great importance to scientists who are called upon to identify small samples scraps of plant material for particular purposes such as pharrnacogonosist in the determination of the source of a drug, or by a forensic expert who may be able to provide clues to a crime investigation, besides others. These and other similar observations have firmly established the role of anatomy in plant identification and classification.
The leaf is perhaps the most varied organ of the angiosperms and provides many anatomical characters of potential taxonomic significance. Investigation of the anatomy of leaves from plants following these pathways has brought out several significant features associated with the two types. The most distinct character observed in the leaves, is the presence of prominent chlorenchymatous sheath surrounding the vascular bundles in the leaves of plants showing the C4 pathway and them absence in the leaves of plants showing the C, pathway. Thus, the leaf anatomy also provides information about the photosynthetic efficiency of a plant.
Early human studies are normally conducted in healthy subjects to assess acute safety and, if applicable, to monitor biochemical and pharmacological responses. These studies also p
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How to Defibrillate? Three shocks should be given initially in a 200J - 200J - 360J sequence. For most recoverable situations, 200J would be adequate and results in least myco
Q. How is gas exchange done in flatworms? Platyhelminthes exchange gases exclusively by diffusion through their body surface. This is only possible because all cells are locali
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Patterns of Metamorphosis The pattern of metamorphosis is not the same in all insects and so metamorphosis can be broadly classified into 3 types: (1) Complete metamorphosi
what re conjugated proteins and how are they classified?
What best describes the amoebas division? (1) It is a Mode of asexual account in which a one parent is involved. The amoeba cell, which is unicellular, separates into two daug
C omp ut e d radiography: The development of intensifying screen has greatly improved the efficiency of exposure and has reduced the exposure time. The fir
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