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Life Forms - Qualitative Characters
The form and structure of terrestrial communities are determined by the nature of vegetation. Vegetation may be classified according to growth form. The plants may be tall or short, herbaceous or woody, evergreen or deciduous. We might speak of trees, shrubs, and herbs, and then further sub-divide these categories into needle-leaved evergreens, broad-leaved evergreens, broad-leaved deciduous, shrubs, ferns, grasses and so on and so forth.
A more useful system was proposed by a Danish botanist, Christen Raunkiaer in the year 1903. In this system, instead of considering plants' growth form, he classified plants by life form, the relation of their height above ground to their perennating organ. A perennating organ is one that survives from one growth season to the next, remaining inactive over winter or dry periods. Perennating tissue is the embryonic or meristematic tissue of buds, bulbs, tubers, roots and seeds.
Overall senescence - Senescence Only the parts above the ground level i.e. The aerial parts die whereas the underground parts survive For example, potato.
What are some prophylactic measures against ascariasis? The main prophylactic calculates against ascariasis are: efficient washing of vegetables and other foods; basic sanitar
Cracking is the process in which large molecules are broken into smaller molecules. C 10 H 22 C 5 H 12 + C 5 H 10 C 8 H
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Q. How is the excretory system of molluscs characterized? Molluscs have one or two pair of spongelike nephridia, similar to kidneys
Xerophytes Xerophytes are sometimes loosely defineri as 'plants of dry habitats'. But others have defined xerophytes as 'plants which grow on the substratum that usually beco
Medical Management Trealment of choice is cephalosporin which is given interavenously, alternatively can be given. In case of increased intra cranial pressure mannitol and o
Determine about the prokaryotes and eukaryote cell The eukaryotic cells, on the other hand, have a true nucleus wherein the genetic material, DNA is enclosed within a well-def
Morphogenetic Movements Gastrulation is a dynamic process including a variety of coordinated movements of cells of dissimilar areas of the blastula. The movements of cells in
notes on urea
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