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Photoperiodism
Activity like breeding and migration in animals; flowering, seed germination in plants are regulated by the length of daily period of light and darkness. This behavioural phenomenon is known as photoperiodism. For example, plants such as radish, potatoes and spinach bloom when the light duration is more than 12 hours/day. Such plants are called long day plants. Cereal, tobacco, dahelia and many other plants bloom when light duration is less than 12 hrs/day. These are called short day plants. Such responses show that plants have built-in mechanisms for measuring the duration of illumination and darkness and hence flower in a specific seasons.
Similar photoperiodic responses are observed in animals. These may be diurnal, lunar or annual. Reproduction and migration in birds are such annual photoperiodic responses. From such responses it seems that distribution of some plants and animals may be restricted because the necessary photoperiodic stimulus is available only at certain latitudes.
Membrane proteins are classify as either integral (intrinsic) or peripheral (extrinsic) depending on how tightly they are linked with membrane. The Integral membrane proteins are s
Q. List the goals of management of Type 1 Diabetes Mellitus? Goals of management of Type 1 Diabetes Mellitus: a) to keep blood sugar level as close to normal as possible.
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Functional Regurgitation : Dilatation of right ventricle and tricuspid annulus leads to regurgitation. This is the most common type associated with mitral valve disease and
#questionwhy is urea the major nitrogenous excretory product..
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Explain Acute Infections Fever Acute Infections Fever: Acute fevers are of short duration with acute symptoms, the body temperature may rise to above 104°F. Examples of such i
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