Q. What is breathing? Ans. Breathing is an external process, in this process inhale of air and exhale of air. Or Breathing (or ventilation) is the process of moving air into and out of the lungs to facilitate gas exchange with the internal environment, mostly by bringing in oxygen and flushing out carbon dioxide. Breathing is also known as external respiration. It is part of respiration but not internal or cellular respiration. The process of breathing does not fill the alveoli with atmospheric air during each inhalation (about 350 ml per breath), but the inhaled air is carefully diluted and thoroughly mixed with a large volume of gas (about 2.5 liters in adult humans) known as the functional residual capacity which remains in the lungs after each exhalation, and whose gaseous composition differs markedly from that of the ambient air . Physiological respiration involves the mechanisms that ensure that the composition ...
Natural Vegetative Propagation
Natural
vegetative propagation occurs when an axillary bud grows into a lateral shoot and develops its own roots
(also known as adventitious roots). Plant structures allowing natural
vegetative propagation include bulbs, rhizomes, stolons and tubers.
Natural Reproduction done by following methods:
a. By Roots: In this process, new plants grow
out of the modified roots called tubers. Some plant roots also develop adventitious
buds. These buds grow and form new plants/sprouts under the right conditions.
These sprouts can be separated from the parent plant and when planted in other
areas, new plants are formed. E.g. Sweet potato, Dahlia etc.
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