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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.
Lauric Fats Fats of this group are derived from certain species of palm, such as coconut. The fats are characterized by their high content of lauric acid (40 - 50%), moderate
Obturator - Ovule An obturator is an outgrowth of the placenta or funicle or integument or style near the micropyle. It is presumed to guide the pollen tube to the micropyle.
Explain Bioluminescence - Ethological Approach in Taxonomy In those animals which exhibit bioluminescence. The pattern produced by the bioluminescence is used in taxonomy. It h
Name three effects that inbreeding can have on a population. Inbreeding can decrease the number of offspring produced, increase susceptibility to disease, reduce genetic varia
Terminal process of diseased stage This is the last stage in the process of disease. In this stage, the disease process is halted either temporarily or permanently. There are t
Insulin promotes fat synthesis and storage. Insulin transports fatty acids in the liver cells and then these are transported from the liver by blood to the adipose cells and are st
Cytokinins - Apical Dominance Cytokinins are also involved in the regulation of apical dominance. Wickson and Thimann studied the interaction of cytokinins and auxins in contr
Pressure calculation made using the Bernoulli equation may be used in conjunction with pressure measurements made by other modalities to determine various intracardiac pressure.
Vitamin A (Retinol) Purified vitamin A is a viscous yellowish oil. It is freely soluble in most organic solvents such as methanol, ether, acetone, chloroform and petroleum ethe
Which of the following serves as an effector, or as part of an effector, that functions in a negative feedback system? A. Nicotinic Acetylcholine Receptors (nAChR) in SA node c
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